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(i)intsec^(7) x. sin x dx" "(ii) int...

`(i)intsec^(7) x. sin x dx" "(ii) int(1)/(sinx. cos^(2) x)dx`

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`(i) (1)/(6) sec^(6) x+c " "(ii) sec x+ log | " cosec " x- cot x |+c`
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