Question

Sin( 3pi/4 ) =
O A. 1/2
OB. -√2/2
O C. √3/2
O D. √2/2

Answer 1

D

Explanation:

sin ( 3pi / 4 )

= sin ( pi - pi / 4 )

= sin ( pi / 4 )

= 1/root(2)

= root(2) / 2