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    • Posted by Dharmesh Kushwaha 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 4 answers

    Aman Jaiswal 4 years, 4 months ago

    Ok khushi dii

    0Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Cos nii cos h aman

    0Thank You

    Aman Jaiswal 4 years, 4 months ago

    Rewrite your question please

    0Thank You

    Aman Jaiswal 4 years, 4 months ago

    Cod ?

    0Thank You

    ANSWER

    • Posted by Dharmesh Kushwaha 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Mr. Badmash 4 years, 4 months ago

    Diff. With respect to x,,d/dx(x^3)+d/dx(ycosx) = d/dx(7y),=> 3x^2 -y sinx + cosx dy/dx = 7dy/dx, =>(3x^2-y sinx) =( 7-cosx) dy/dx, => (3x^2-y sinx) /(7-cosx) = dy/dx

    1Thank You

    ANSWER

    • Posted by Vansh Agarwal 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Khushi....? ??‍? 4 years, 4 months ago

    Wapas se sirf improvement exams honge un papers k jinme average marking ki gyi h...

    0Thank You

    ANSWER

    • Posted by Vansh Agarwal 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 2 answers

    Mishti ???? 4 years, 4 months ago

    All the best bhaiya ??

    0Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Compartment exams nii hoga...

    0Thank You

    ANSWER

    • Posted by Sonu Kumar 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Mishti ???? 4 years, 4 months ago

    All the best bhaiya ???

    1Thank You

    ANSWER

    • Posted by Akash Mudgal 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Khushi....? ??‍? 4 years, 4 months ago

    Yes of course but dates are not defined yet....

    0Thank You

    ANSWER

    • Posted by Mishti ???? 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 5 answers

    Khushi....? ??‍? 4 years, 4 months ago

    Koi secret nii h cuties aap log to jyada chadha rhe h....mene sirf self studies ki h or kuch nii....do practice and always stick to your goals.....???

    2Thank You

    Aman Jaiswal 4 years, 4 months ago

    Congratulations khushi dii u score very well in your 12th class exams plz kindly share your secret of success in 12th class to your junior's also

    1Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    All your and my family froends support and my work and study...... cutie....?

    1Thank You

    Mishti ???? 4 years, 4 months ago

    95% ???????????? Its okk di ?? What is the secret of getting this outstanding result??

    2Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Thanku mishti...and teally I scored 95 percent marks....thanks cutiepie....❤❤??

    4Thank You

    ANSWER

    • Posted by Swapna Shri 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Subhankar Sharma 4 years, 4 months ago

    Just go through the basic concepts . And memorize the formulas often needed.

    0Thank You

    ANSWER

    • Posted by Sumit Kumar Yadav 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Gaurav Seth 4 years, 4 months ago

    We have f'(x)

    = (esinx × cosx)

    0Thank You

    ANSWER

    • Posted by Sumit Kumar Yadav 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Subhankar Sharma 4 years, 4 months ago

    e^sinx.cosx

    0Thank You

    ANSWER

    • Posted by Aparna Mehra 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 5 answers

    Vinay Gautam 4 years, 4 months ago

    RED School charkhi dadri haryana

    0Thank You

    Ankita ?? Arpita☺️ 4 years, 4 months ago

    Vikash residential school bbsr.. Odisha

    0Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Divine sainik school varanasi...UP

    0Thank You

    Nilofar Jahan 4 years, 4 months ago

    Paljor Namgyal Girls' School (Sikkim)

    1Thank You

    Bharat Bhushan Singh 4 years, 4 months ago

    Padma vidyale govt. School

    2Thank You

    ANSWER

    • Posted by Prakhar Agrawal 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Vaishali Chaudhary 4 years, 4 months ago

    3π-10

    0Thank You

    ANSWER

    • Posted by Sumit Kumar Yadav 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Mr. Badmash 4 years, 4 months ago

    Let y = 2^x cot x /√x = 2^x cot x (x) ^-1/2 Then, let, u = 2^x. , v = cotx and w = (x) ^-1/2 Now, d/dx(u.v.w) = d/dx(u).v. w + u. d/dx(v).w + u. V. d/dx(w)...... Put all the values in this formula and solve it

    3Thank You

    ANSWER

    • Posted by Rock ×Himanshu 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Arundhati Patil ??? 4 years, 4 months ago

    Yes

    0Thank You

    ANSWER

    • Posted by Amal Albin 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 4 answers

    Ankita ?? Arpita☺️ 4 years, 4 months ago

    Rd sharma

    0Thank You

    Rock ×Himanshu 4 years, 4 months ago

    As u wish dude if u will solve dc pandey then rd is too easy

    0Thank You

    Rock ×Himanshu 4 years, 4 months ago

    Dc pandey

    0Thank You

    Rishabh Rishabh 4 years, 4 months ago

    RD SHARMA

    2Thank You

    ANSWER

    • Posted by Ankit Chaudhary 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Fanishwar Goutam 4 years, 4 months ago

    Trigonometry

    0Thank You

    ANSWER

    • Posted by Hunny Bhardwaj 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Gaurav Gaming 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Mishti ???? 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 5 answers

    Khushi....? ??‍? 4 years, 4 months ago

    Thanku cutiepie...mishti...❤❤??

    2Thank You

    Mishti ???? 4 years, 4 months ago

    I m upset because i have studied the main topics with my all efforts & it is now deducted ????? Now i see the whole changes?? &,I m also be happy if the syllabous is not reduced☺☺ Main topics mean a lot to are future comptetion exams or knowledge is the thing which how more we take it it is good for us?? Di i wish for u a good future ??? I know u got nice marks in boards. Regards. ??

    1Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Just for knowing.....u cutiepie.....I have pessed 12th that's why I asked and truely for that I don't need any deduction in my syllabus.....???

    1Thank You

    Baso Lal 4 years, 4 months ago

    What

    0Thank You

    Rishab Jain 4 years, 4 months ago

    ???

    0Thank You

    ANSWER

    • Posted by Nithish S 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Khushi....? ??‍? 4 years, 4 months ago

    x^4/4 + x^3/3 + x^2/2 + x + c......

    0Thank You

    ANSWER

    • Posted by Gopal Nayar 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 2 answers

    Gopal Nayar 4 years, 4 months ago

    Let a =b a×a = b×a a^2 - b^2 = b×a - b^2 (a - b )(a + b) = b( a - b ) a+ b = b b + b = b 2b = b 2 = 1 proved.

    1Thank You

    8D Bass Nation 4 years, 4 months ago

    1=2: A Proof using Beginning Algebra The Fallacious Proof: Step 1: Let a=b. Step 2: Then a²=ab, Step 3: a²+a²=a²+ab, Step 4: 2a²=a²+b Step 5: 2a²-2ab=a²+ab-2ab Step 6: and 2a²-2ab=a²-ab. Step 7: This can be written as 2(a²-ab)=1(a²-ab), Step 8: and cancelling the a²-ab from both sides gives 1=2.

    0Thank You

    ANSWER
    7+8

    • Posted by Ayush Vatsal 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 5 answers

    Rishab Jain 4 years, 4 months ago

    Nice ques. ,Kidding ? ?? ask questions which is important not for time pass

    0Thank You

    Vishal Sharma 4 years, 4 months ago

    It is very hard question which is important for jee advance ????????

    1Thank You

    Insha Khalid 4 years, 4 months ago

    15

    0Thank You

    Gaurav Gaming 4 years, 4 months ago

    15

    0Thank You

    Gopal Nayar 4 years, 4 months ago

    15

    2Thank You

    ANSWER

    • Posted by Prapti Kumari 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Gaurav Seth 4 years, 4 months ago

    How do you find inverse using elementary transformation?

    But we can only do these "Elementary Row Operations":

    1. swap rows.
    2. multiply or divide each element in a a row by a constant.
    3. replace a row by adding or subtracting a multiple of another row to it.

    1Thank You

    ANSWER

    • Posted by Fillbestar Jaba Jaba'S Blood 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Sayani Manna 4 years, 4 months ago

    Let, y=2^(sinx) Step 1: Taking logarithm to both sides, log y = log {2^(sinx)} Or, log y =(sinx).(log 2) Step 2: Differentiating both sides w.r.t. x, (1/y)(dy/dx)= (sinx).(d/dx)(log 2) + (log 2 ).(d/dx)(sin x ) Or, dy/dx ={ 0 + (log 2). (cos x)}y Or, dy/dx = 2^(sin x ).(cos x).(log 2)

    1Thank You

    ANSWER

    • Posted by Kanchan Singh 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 4 answers

    Kanchan Singh 4 years, 4 months ago

    Only 3.4

    0Thank You

    Mishti ???? 4 years, 4 months ago

    Only 3.4 is reduced dear

    1Thank You

    Kanchan Singh 4 years, 4 months ago

    According to new syllabus class 12 th third chapters kon konsi exercise nhi krni

    2Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Kya

    6Thank You

    ANSWER

    • Posted by Smile Josan 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 3 answers

    Fanishwar Goutam 4 years, 4 months ago

    Trigonometry ki exercise 8.3 nhi aa rahe h

    0Thank You

    Aaiman Farhin 4 years, 4 months ago

    What is eliminated from the syllabus.

    0Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    It is in the syllabus

    0Thank You

    ANSWER

    • Posted by Akash Pandey 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Gaurav Seth 4 years, 4 months ago

    Answer :  π/3

    We know that angle between two lines is 

    l +m +n= 0
    ⇒ l = - (m+n)
    ⇒ (m+n)2 = l2
    ⇒ m2 +n2 +2mn = m2 +n2
    [∵ l2 = m2 +n2, given]
    ⇒ 2mn = 0
    when m = 0 ⇒ l =-n
    Hence, (l, m, n) is (1,0-1)
    When n =0, then l =-m
    Hence, (l,m,n) is (1,0-1)

     

    We know that angle between two lines is 

    l +m +n= 0
    ⇒ l = - (m+n)
    ⇒ (m+n)2 = l2
    ⇒ m2 +n2 +2mn = m2 +n2
    [∵ l2 = m2 +n2, given]
    ⇒ 2mn = 0
    when m = 0 ⇒ l =-n
    Hence, (l, m, n) is (1,0-1)
    When n =0, then l =-m
    Hence, (l,m,n) is (1,0-1)

    0Thank You

    ANSWER

    • Posted by Mishti ???? 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 5 answers

    Anuj Kaushik 4 years, 4 months ago

    Glad to hear that. ??

    1Thank You

    Aaiman Farhin 4 years, 4 months ago

    Congrats to all

    1Thank You

    Suman Sharma 4 years, 4 months ago

    Same to you mishti???

    2Thank You

    Khushi....? ??‍? 4 years, 4 months ago

    Mishti kya aap is year 12 me gyi ho...

    4Thank You

    Mr. Badmash 4 years, 4 months ago

    Same to you mishti??

    3Thank You

    ANSWER

    • Posted by Jasveer Gangwar 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    volume of cube is increasing at the rate of 8cm³/s. e.g., 
    edge length , a = 12cm

    we know volume of cube , V = a³
    now differentiate with respect to time,

    put a = 12cm and dV/dt = 8cm³/s
    now, 8 = 3(12)² da/dt
    8 = 3 × 144 × da/dt
    => da/dt = 1/54 cm/s -----(1)

    we also know surface area of cube , A = 6a²
    differentiate A with respect to time,
    dA/dt = 12a da/dt

    put a = 12cm and from equation (1),
    so, dA/dt = 12 × 12 × 1/54 = 144/54 = 8/3

    hence, rate of change of surface area of cube is 

    0Thank You

    ANSWER

    • Posted by Saurabh Tripathi 4 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    8D Bass Nation 4 years, 4 months ago

    Ex 5.1,8 teachoo.com Find all points of discontinuity off, where fis defined by 1x f(x) = if x = 0 10, if x = 0 Since we need to find continuity at of the function We check continuity for different values of x When x = 0 When x>0 When x<0 Since there are two different Case 1: When x = 0 f(x) is continuous at x = = 0 functions on the left & right of o, we take LHL & RHL. if L.H.L = R.H.L= f(0) if f lim f(x) lim f(x) = f(0) X-0- X-07 LHL at x → 0 RHL at x 0 lim f(x) = lim f(0 - h) X-0 h-0 lim f(x) = lim f(0 + h) h-0 x0+ = lim f(-h) h→0 = lim f(h) h→0 -h| = lim h→0 -h Th1 = lim h0 h h = lim h-h h = lim h-oh = lim -1 h-0 - lim 1 h→0 = 1 = -1 Since L.H.LR.H.L f(x) is not continuous at x = 0 Case 2: When x < 0 For x<0, f(x) = L x 1 (-x) f(x) = (As x < 0, x is negative) f(x) = -1 Since this constant It is continuous .. :: f(x) is continuous for x < 0 Case 3: When x > 0 For x>0, 1x f(x) - X х f(x) = X f(x) = 1 (As x > 0, x is positive) Since this constant It is continuous . :: f(x) is continuous for x > 0 Hence, only x = 0 is point is discontinuity. :: f is continuous for all real numbers except 0. Thus, f is continuous for x ER-{0}

    0Thank You

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