sin(60) = SQRT(3)/2 =.866
sin(120) = .866
So,
if x = 120, x/2 = 60 cos(60) = .5
Alyssa R.
asked • 07/23/19How to find cos (x/2)
If sin= √3/2, and 90° < x < 180°, what is cos (x/2)?
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