Prove (i)"sin"^(2)(pi)/(8)+"sin"^(2)(3pi...

Prove (i)`"sin"^(2)(pi)/(8)+"sin"^(2)(3pi)/(8)+"sin"^(2)(5pi)/(8)+"sin"^(2)(7pi)/(8)=2`
(ii)`[1+cotalpha-sec((pi)/(2)+alpha)]`
`[1+cotalpha+sec((pi)/(2)+alpha)]=2cotalpha`

A

1

B

`-1`

C

0

D

2

Verified by Experts

The correct Answer is:

D

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