Falling Behind in Studies? Join Our Performance Improvement Batch. Enroll For Free
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Live 1-1 coding classes to unleash the creator in your Child
evaluate integrand sin(3x)cos(4x)cos(7x)
I = sin3x.cos4x.cos7xdx =1/2 [sin3x(2cos4xcos7x)]dx (2cosacosb = cosa+b+ cosa-b ) =1/2[sin3x(cos11x + cos3x)]dx =1/4[2sin3xcos11x +2sin3xcos3x]dx (2sinacosb = sina+b + sina-b) =1/4[sin14x - sin8x + sin6x]dx =1/4 [-cos14x/14 + cos8x/8 - cos6x/6] + c
I = sin3x.cos4x.cos7xdx
=1/2 [sin3x(2cos4xcos7x)]dx (2cosacosb = cosa+b+ cosa-b )
=1/2[sin3x(cos11x + cos3x)]dx
=1/4[2sin3xcos11x +2sin3xcos3x]dx (2sinacosb = sina+b + sina-b)
=1/4[sin14x - sin8x + sin6x]dx
=1/4 [-cos14x/14 + cos8x/8 - cos6x/6] + c
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -