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    • Posted by Himangni Sahu 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Ankita Rawniyar 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Abhishek Kumar 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 3 answers

    Rahul Poddar 8 years, 1 month ago

    For 3 digit even number the third must be even like 124,374 so, third place/unit place is filled by 3 ways then 2nd is filled by 5 ways and 1st place is filled by 4 ways so, no of selection=4×5×3=60ways

    1Thank You

    Tamizh Iniyan 8 years, 1 month ago

    3digits even number Even number are 2,4,6 So it's 6P3

    1Thank You

    Rahul Poddar 8 years, 1 month ago

    120,..6p3

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    • Posted by Hardik Bhandari 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Sadhna Sahu Sahu 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Reema Kumari 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Kritika Trehan 8 years, 1 month ago

    Binomial theorem is heavily used in probability theory . Binomial theorem is used in forecast services .the future weather forecasting is impossible without binomial theorem.the disaster forecast is also depend upon binomial theorems

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    • Posted by Shweta Lathwal 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Rahul Poddar 8 years, 1 month ago

    1

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    • Posted by Sandeep Chandravanshi 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Sk Sk 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Veerendra Singh Meena 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Shoba Ponnuraj 8 years, 1 month ago

    Example 14:  {tex}cos 2x = cos^2x – sin^2 x = 2 cos^2 x – 1 = 1 – 2 sin^2 x = 1-tan^2x/1+tan^2x{/tex}

    solution :

    we know that {tex} cos (x + y) = cos x cos y – sin x sin y{/tex}

    Replacing y by x, we get

    {tex}cos 2x = cos^2x – sin^2 x = 2 cos^2 x – 1 {/tex}

    {tex}= cos^2 x – (1 – cos^2 x) = 2 cos^2x – 1{/tex}

    Again,

    {tex}cos 2x = cos^2 x – sin^2 x{/tex}

    {tex}= 1 – sin^2 x – sin^2 x = 1 – 2 sin^2 x.{/tex}

    we have,

    {tex} cos 2x = cos^2 x – sin ^2 x =(cos^2 x – sin ^2 x) /( cos^2 x +sin ^2 x){/tex}

    Dividing each term by {tex}cos^2x{/tex} we get,

    {tex}cos 2x = 1-tan^2x/1+tan^2x{/tex}

    Hence Verified.

    0Thank You

    Sanoj S Nair 8 years, 1 month ago

    Gud one

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    • Posted by Ambesh Dubey 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Nikki Dhakad 8 years, 1 month ago

    1/9!(1/1 + 1/10 + 1/11×10) 1/9!(10×11+11+1)/11×10 1/9! (122/11×10) 122/11×10×9! 122/11!

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    • Posted by Saurabh Sharma 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Sachin Kumar 8 years, 1 month ago

    Practise daily as making some bodmas calculations.or numericals.

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    • Posted by Sachin Kumar 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Aryan Tripathi 8 years, 1 month ago

    Let. Breadth be 'x' then,length is 3x Area :75 (x)(3x) :75 X square :25 Then, x:5 By putting this leng th :15 and Breadth: 5 By pythagoras theorem. Diagonal :5 root 10

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    • Posted by Ankit Singh 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Naaaaaaaaaaaaaaaaaaa Naaaaaaaaaaaaaaaaaaa 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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    • Posted by Parth Mathur 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Nikhil Malik 8 years, 1 month ago

    Yes

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    • Posted by Vineet Sharma 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Taranveer Sharma 8 years, 1 month ago

    Hmm

    1Thank You

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    • Posted by J Mondal 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Naaaaaaaaaaaaaaaaaaa Naaaaaaaaaaaaaaaaaaa 8 years, 1 month ago

    1,2,3,5,8,13...... Go on adding the preceding number....

    1Thank You

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    • Posted by Chandranshu Pandey 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Seema Chauhan 8 years, 1 month ago

    (2x+3y=5)5;(5x+7y=1)2 By subtracting both we get 10x-10x+15y-14y =25-2 y=23 Putting the velue of y in equation 1 2x+3y=5 2x+3×23=5 2x=5-69 2x=-64 x=-32

    1Thank You

    Rakhi Bhandari 8 years, 1 month ago

    y= 1-7x/5 putting the value of y in equation 2x+3y= 5 2x+3(1-7x/5)= 5 2x+(3-21x/5)= 5 (10x+3-21x/5)=5 (-11x+3/5)=5 -11x+3=25 -11x=25-3 -11x=22 x=-22/11 x=-2 2x+3y=5 2(-2)+3y=5 -4+3y=5 3y=5+4 3y=9 y=3

    3Thank You

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    • Posted by Amit Yadav 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Alone But Awesome 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Seema Chauhan 8 years, 1 month ago

    Let the radius of the circle is 'r' then area is πr² And 1%of radius 'r' is r×1%=r÷100 The area of new circle is π(r+r/100)² π(101r/100)² π×10201r²/10000 Increment in area is πr²-πr²10201/10000 πr²(1-10201/10000) πr²(10000-10201/10000) πr² (201/10000) The increment is 201/10000

    1Thank You

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    • Posted by Saloni Kummmm 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Himanshi Singla 8 years, 1 month ago

    18

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    • Posted by Anamika Rajput 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Anurag Pokhriyal 8 years, 1 month ago

    We are given that we have to find out the sum of the squares of first 20 terms, here we will use the formula of (the sum of squares of first n terms)....n(n+1)(2n+1)/6

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    • Posted by Twinkle Joshi 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Anamika Rajput 8 years, 1 month ago

    a+(m-1)d=n...case 1 a+(n-1)d=m...case 2 From 1 and 2 (m_n)d=n-m Therefor..d=-1 Putting value of of d in 1 a+(m-1)-1=n a-m+1=n a=n+m-1 :p th term; a+(p-1)d =n+m-1+(p-1)(-1) =n+m-1-p+1 Here..-1 and +1 get cancelled. =n+m-p Hence..pth term =n+m-p.

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    • Posted by Akash Prajapati 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Varun Banda 8 years, 1 month ago

    A relation is a function if it "maps" elements of one set to another set. That means that each element in the first set can appear at most in one pair in the first entry.

    The example shows two elements of the first set can be mapped to the same element of the second set.

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    • Posted by Sk Sk 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Amos Khalthang 8 years, 1 month ago

    RHS, [(n!) +(n+1)!] =(n!) +(n+1).(n!) =(n!). (1+n+1) (on taking common) =(n!). (n+2) LHS, (n!). (n+2) Therefore, RHS=LHS

    1Thank You

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    • Posted by Sachin Singh 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Pooja Sharma 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Deepanshu Pal 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Alone But Awesome 8 years, 1 month ago

    5(2-2)=2^2-2^2 that is 5(2-2)=(2+2)(2-2) (2-2) will cancel both sides then remains (2+2)=5 hence proved

    0Thank You

    Alone But Awesome 8 years, 1 month ago

    I can write 10-10=4-4 that is

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    • Posted by Rohan Rawat 8 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 0 answers
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