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anonymous
 5 years ago
Find the exact value of the trigonometric function at the given real number?
 Sin (21pi/2)
 Cos (21pi/2)
 Cot (21pi/2)
anonymous
 5 years ago
Find the exact value of the trigonometric function at the given real number?  Sin (21pi/2)  Cos (21pi/2)  Cot (21pi/2)

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\sin(21\pi /2 ) = (21\pi/2 )(180/\pi) = \sin(1890) = 1\]\[\cos(21\pi / 2) = (21\pi/2)(180/\pi) = \cos(1890) = 0\]\[\cot(1890) = 1/\tan(1890) =\cos(1890)/\sin(1890) = 0\] All you have to do is convert the angle from radians to degree by multiplying the given angle with: \[180/\pi\] but if you want to convert from degree to radians then multiply by: \[\pi/180\] ^_^
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