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Evaluate tan ^ (-1) {sin (-pi/2)}...

Evaluate ` tan ^ (-1) {sin (-pi/2)}`

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`tan^{-1} (sin(frac{-pi}{2}))`
`=tan ^{-1} (-sin (frac{pi}{2}))`
`=tan ^{-1}(-1)=-frac{pi}{4}`
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RD SHARMA-INVERSE TRIGONOMETRIC FUNCTION-Solved Examples And Exercises
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