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Will the marks of unit tests be added in board??? Like it was done in 10th class. Mainly iam asking for subject like maths and English....

Posted by Kumar Vishal Behera 6 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Kumar Vishal Behera 6 years, 4 months ago

Hey where is S. Priya? Do u know??

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Aman Kumar 6 years, 4 months ago

No....it will not added

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Prove that Sin inverse X + Cos inverse X is equal to pi by 2

Posted by Ajay Kumar Rana 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Aakarsh Sharma 6 years, 4 months ago

Put x=sin x sin'(sin x)+cos'(sin x) =x+cos'[cos(π/2 -x)] =x+π/2-x =π/2

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Show tat of all the rectangles of given area the squares has the smallest perimeter

Posted by Cristiano Ronaldo 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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XPower X power x differentiate

Posted by Ruksar Fatima 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Pawan Panwar 6 years, 4 months ago

Introduce log both sides and then differentiate it

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Integration of x^2 cos^3x

Posted by Esha Jha 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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If A and B are two matrices such that AB=B and BA=A find A^2+B^2

Posted by Mohan Babu 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

What is the defination of parallelel line ? Is one line is parallel to itself? Please explain me

Posted by Subrat Samantray 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Alisha Wadhwa 6 years, 4 months ago

Parallel lines are those lines which do not intersect at any point.. Yes,,a line is parallel to itself.

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What will be the integral of sin^2 x

Posted by Atul Kushwaha 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Let {tex}I = \int\limits_{\frac{{ - \pi }}{2}}^{\frac{\pi }{2}} {{{\sin }^2}xdx} {/tex}

{tex}= 2\int\limits_0^{\frac{\pi }{2}} {{{\sin }^2}xdx} {/tex} ...(i)

{tex}{\because \int\limits_{ - a}^a {f\left( x \right)dx = 2\int\limits_0^a {f\left( x \right)dx,} } }{/tex} when f(x) is even function]

{tex}\Rightarrow I = 2\int\limits_0^{\frac{\pi }{2}} {{{\sin }^2}\left( {\frac{\pi }{2} - x} \right)dx} {/tex}

{tex}\left[ {\because \int\limits_0^a {f\left( x \right)dx = \int\limits_0^a {f\left( {a - x} \right)dx = } } } \right]{/tex}

{tex}\Rightarrow I = 2\int\limits_0^{\frac{\pi }{2}} {{{\cos }^2}xdx} {/tex} …(ii)

Adding eq. (i) and (ii),

{tex}2I = 2\int\limits_0^{\frac{\pi }{2}} {\left( {{{\sin }^2}x + {{\cos }^2}x} \right)dx} {/tex}

{tex}= 2\int\limits_0^{\frac{\pi }{2}} {1dx} {/tex}

{tex}= 2\left( x \right)_0^{\frac{\pi }{2}}{/tex}

{tex} = 2.\frac{\pi }{2} = \pi {/tex}

{tex}\Rightarrow I = \frac{\pi }{2}{/tex}

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E power x .tanx.cosx

Posted by Ashish Prabhat 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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1-sin²x =

Posted by Ashu A 6 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Kajal Kunwar 6 years, 4 months ago

Cos ^2 x

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Yash Pant 6 years, 4 months ago

Cos^2x

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Anyone have best notes for jee advance + board ?

Posted by Vatsal Kaushik 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

tan^-1 a/b sin^-1 a//(a+b) prove it

Posted by Abhinash Baro 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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tan^-1 a/b = sin^-1 a/√(a²+b²)

Posted by Abhinash Baro 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Anurag Khare 6 years, 4 months ago

Let Tan^-1 a/b = x then tanx = a/b That means perpendicular = a and base = b then hypotenuse= √(a^2+ b^2 ) Since sinx = p/h Therefore sinx = a /√(a^2+ b^2) therefore x = sin^-1 a /√( a^2+ b^2 ) Since x = tan^-1 a/b and x = sin^-1 a/√(a^2+ b^2) therefore tan^-1 a/b = sin^-1 a/√(a^2+ b^2)

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A balloon which always remains spherical on inflation is being inflated by pumping in 900 cubic centimetres of gas per second find the rate at which the radius of the balloon increases when the radius is 15 CM

Posted by Yathartha Solanki. 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Babu Seer Singh 6 years, 4 months ago

Whatsapp no de bhai uspr me answer bhej sakta hu...kuki is app me pic ka system nhi hai.....

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the number of ways in which a committee of 3 women and 4 men be chose from 8 women and 7 men if Mr X refuses to serve on the committee if Mr Y is a member of the committee is ... Please answer it ??

Posted by Rishita Shishir ?✏ 6 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Rishita Shishir ?✏ 6 years, 4 months ago

Yes, it is the question related to permutation & combination

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Kratos Jskfkg 6 years, 4 months ago

Bro... It's in 12 class? I think it's permutation and combination!

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Derivative of a rase to power x

Posted by Nikhil Kumar 6 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Sia ? 6 years, 4 months ago

ln(a) a^x

1Thank You

Aradhya Agarwal 6 years, 4 months ago

Y= a^x Logy=xloga 1/ydy/dx= x/a*0 +loga1 Y'= loga*y

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If 2^y+2^y=2^x+y find dy/dx

Posted by Nidhi Jha 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Aradhya Agarwal 6 years, 4 months ago

Divide it by x+y botg sides then derivatives it

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If y=f(x) then dy/dx

Posted by Azhar Rana 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Subham Agarwal 6 years, 4 months ago

y=f(x) y = f(x) 1. Add Δx When x increases by Δx, then y increases by Δy : y + Δy = f(x + Δx) 2. Subtract the Two Formulas From: y + Δy = f(x + Δx) Subtract: y = f(x) To Get: y + Δy − y = f(x + Δx) − f(x) Simplify: Δy = f(x + Δx) − f(x) 3. Rate of Change To work out how fast (called the rate of change) we divide by Δx: ΔyΔx = f(x + Δx) − f(x)Δx 4. Reduce Δx close to 0 We can't let Δx become 0 (because that would be dividing by 0), but we can make it head towards zero and call it "dx": Δx right arrow dx You can also think of "dx" as being infinitesimal, or infinitely small. Likewise Δy becomes very small and we call it "dy", to give us: dydx = f(x + dx) − f(x) ÷ dx

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Y=epowerx . Sinx

Posted by Rishabh Jain 6 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Find the value of K for which f(x)={1-cos4x , when x=0 and K, when x=0} is continous at x=0 ?

Posted by Rakshit Singh 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Aanchal Kishor 6 years, 4 months ago

F(x) = 1-cos4x F(0)=1 - cos0 = 1-1=0 F(k) = 1-cos 4k F'(k) =4sin4k F'(k) = 0 4sin4k=0 Sin4k = 0 Sin4k=sin0 On comparing. 4k=0 K = 0

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2+2 =4 why

Posted by Shivendra Baghel 6 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Dolly ?️ 6 years, 4 months ago

I tell you both 2+2=4 Because, 2+2=1+1+1+1 There are 4 one's hence its sum is 4

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Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

First tell me 1+1 =2 why?

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what is the principal value of sec^-1(-2)?

Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

shukriya bhai ?

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Arkaprobho Dutta 6 years, 4 months ago

sec^-1(-2)=sec^-1(-sec pie/3) =sec^-1[sec(pie - pie/3)]= Sec^-1[sec(2 pie /3)]=2 pie/3 this is the answer hope it helps you

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Find the point on the curve where tangent is parallel to x axis

Posted by Abhishek Goyal 6 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Tripti Rawat 6 years, 4 months ago

The given curve is y=[x(x-2)]{tex}^2{/tex}

Then, y=[x{tex}^2{/tex}-2x]{tex}^2{/tex}
{tex} \frac { d y } { d x } = 0{/tex}
{tex} \Rightarrow \quad \frac { d } { d x } \left( x ^ { 2 } - 2 x \right) ^ { 2 } = 0{/tex}
{tex} \Rightarrow{/tex}2(x² - 2x)(2x - 2) = 0
{tex} \Rightarrow{/tex} x = 0, 1, 2
When x = 0, then y = [0 -(-2)]² = 0
When x = 1, then y = [1 - 2(1)]² = 1
When x = 2, then y = [2² - 2 {tex} \times{/tex} 2]² = 0
Hence, the tangent is parallel to X-axis at the points (0, 0), ( 1, 1) and (2, 0).