Question 149536: Please help me with this problem!
If cos2A = 0 and 0 < or = A < 2pi, find A.
Thank you, Natalie
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! If cos2A = 0 and 0 < or = A < 2pi, find A.
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2A = 90, 270, 450, 630 degs, etc. (90 + n*180 for n = 0,1,2,3)
A = 45 degs + n*90
A = PI/4 + n*(PI/2)
A = PI/4, 3PI/4, 5PI/4, 7PI/4 within the limits specified
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