Find the angle between 0 and 2π that is coterminal with 800°.
Hint
Keep subtracting 360° until we get there then convert to radians.
Answer
Find the angle between 0 and 2π that is coterminal with .
We have to get up to 0 this time, instead of down below 2π, so keep adding 2π.
Find sin (-30°).
Sine is an odd function, so sin (-a) = -sin a.
Find .
Cosecant is the reciprocal of sine, as well as an odd function.
Cotangent is the reciprocal of tangent, and odd.
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