Question

What is the sine value of 5 pi over 3 ? (5 points)

negative square root 3 over 2
square root 3 over 2
negative one half
one half

Answer 1

Answer: The result can be shown in multiple forms.

Exact Form:

− √ 3 /2

Decimal Form:

− 0.86602540 …

Explanation:

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant.

− sin ( π/3 )

The exact value of

sin ( π /3 ) is √ 3 /2 .

− √ 3 /2