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cot4ysin2ydy is equal to 

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a
−15coty5+C
b
15coty5+C
c
5coty5+C
d
−5coty5+C

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detailed solution

Correct option is A

Let I=∫cot4⁡ysin2⁡ydyI=∫(coty)4cosec2y dy Put cot⁡y=t⇒cosec2⁡ydyI=∫t4(−dt)I=−t55+CI=−15(cot⁡y)5+C


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