Question

Find the following trigonometry values cos (150*) = ? sin (150*) = ?

Answer 1

Answer:

see explanation

Step-by-step explanation:

cos150°

= - cos(180 - 150)°

= - cos30°

= - $\frac{\sqrt{3} }{2}$

-------------------------

sin150°

= sin (180 - 150)°

= sin30°

= $\frac{1}{2}$

Answer 2

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.