Question

Find the following trigonometric values.
Express your answers exactly.
cos(150) =
sin(150) =

Answer 1

Answer:

See below in bold.

Step-by-step explanation:

cos 150 = - cos(180-150)

= -cos 30

= √3/2

sin 150 = sin(180-150)

= sin 30 = 1/2.

Note: the sine is positive in the second quadrant whereas the cosine is negative in the second quadrant.

Answer 2

Answer:

Cos 150°=-(√3)/2

Sin 150=1/2

Step-by-step explanation:

Check out attached images for steps