Question

Find the trigonometric functions of :

−270°

Answer 1

Angle of measure (– 270°):

Let m∠XOA = −270°

Its terminal arm (ray OA) intersects the standard unit circle at P(0, 1).

∴ x = 0 and y = 1

sin (– 270°) = y = 1

cos (– 270°) = x = 0

tan (– 270°) = `y/x = 1/0`,

which is not defined.

cosec (–270°) = `1/y = 1/1` = 1

sec (–270°) = `1/x = 1/0`,

which is not defined

cot (–270°) = `x/y = 0/1` = 0