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Could you please tell whether this answer is correct or not? If it is wrong, please tell the right answer?

Could you please tell whether this answer is correct or not? If it is wrong, please tell the right answer?

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1 Answers

Aditya Gupta
2081 Points
4 years ago
in the 2nd last step u hve got 
¼ * ( – 3/2 cos(2x+1) + cos(6x+3)/6 )
= – 3/8 cos(2x+1) + cos(6x+3)/24, hence your last step has a mistake of multiplication.
also, another easy way to do this ques can be as follows:
put t= 2x+1
so we have ½ *∫sin^3t dt
now, for ∫sin^3t dt, put cost= u and write ∫sin^3t dt= ∫sin^2t * sint dt= ∫(1 – cos^2t) * sint dt and solve further
kindly approve :))

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