SOLUTION: Simplify completely: sqrt of fraction 1-cos40/2

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Question 1180336: Simplify completely:
sqrt of fraction 1-cos40/2
Answer by ikleyn(53763) About Me  (Show Source):
You can put this solution on YOUR website!
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Use the formula of Trigonometry


sqrt%28%281-cos%28alpha%29%29%2F2%29 = sin%28alpha%2F2%29.


From the formula,  sqrt%28%281-cos%2840%2Ao%29%29%2F2%29 = sin(20°).     ANSWER

Solved, answered and explained.