Asked by Partha banerjee
If sinA=0.5 , what is the value of cos2A and sin2A?
Answers
Answered by
Damon
You do not even need the trig formulas for this because if sin A = .5 then in the first quadrant A = 30 degrees
so 2A = 60 degrees
cos 60 = 1/2
sin 60 = (1/2)sqrt 3
so 2A = 60 degrees
cos 60 = 1/2
sin 60 = (1/2)sqrt 3
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