Question

Find the trigonometric functions of – 315 °

Answer 1

Answer:

Explanation:

On the trig unit circle,

sin (315) = sin (-45 + 360) = sin (-45) = - sin (45)

Trig table gives ->

sin

315

=

−

sin

45

=

−

√

2

2

cos 315 = cos (- 45) = cos 45 =

√

2

2

tan

315

=

sin

cos

=

−

1

cot 315 = 1/tan = -1

sec = 1/cos = sqrt2

csc = 1/sin = - sqrt2