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If tan(picostheta)=cot(pisintheta), the...

If `tan(picostheta)=cot(pisintheta),` then prove that `cos(theta-(pi)/(4))=pm(1)/(2sqrt(2))`

A

`(1)/(2sqrt(2))`

B

`(1)/(sqrt(2))`

C

`(1)/(2)`

D

`(1)/(4)`

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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 B ( COMPOUNDS ANGLES )
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