Question

PLATO USERS!

Select the correct answer from each drop-down menu.

cos(420°) =
sin(450°) =

Answer 1

See below in bold.

Explanation:

cos (420) = cos (420 - 360)

= cos 60

= 1/2.

sin 450 = sin(450-360)

= sin 90

= 1.

Answer 2

see below

Explanation:

cos(420°) = cos 60 = 1/2

sin(450°) = sin 90 = 1