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Find the exact value of sin and csc. Rationalize all denominators

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The given point (2, -1) is on the terminal side of an angle in standard position. Find the exact value of sin and csc. Rationalize all denominators
asked Sep 15 in TRIGONOMETRY by anonymous
reshown Sep 15 by bradely

1 Answer

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Calculate hypotenuse.

x = 2 and y = -1

hypotenuse, r=√(2^2+(-1)^2) =√5

sin theta =y/r =-1/√5

csc theta =r/y =√5/-1=-√5

answered Sep 17 by johnkelly Apprentice
reshown Sep 17 by bradely

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