Use a ​half-number identity to find an exact value for the​ function, given the information about x.

Question

sin x/2 , given sin x = -3/5 , with 3π/2 < x < 2π

a. -√30 /10

b. √10 /10

c. √5 /5

d. -√5 /5

Answer 1

The angle is 323.13010235415597870314438744091... because the angle is in the 4th quadrant

where the sine is negative

So the sine of half that angle is 0.31+, so the answer is B