Question #46d1d

1 Answer
Nghi N
Jun 12, 2017

sqrt3/2, 1/2

Explanation:

Find arcsin (sqrt3/2)
Use trig table and unit circle -->
sin x = sqrt3/2 --> 2 solutions -->
x1 = pi/3 and x2 = (2pi)/3
There are 2 answers:
a. cos ((x1)/2) = cos (pi/6) = sqrt3/2
b. cos ((x2)/2) = cos ((2pi)/6) = cos (pi/3) = 1/2

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