SOLUTION: If sin A= -1/squareroot of 5 with A in QII, find sin 2A.

SOLUTION: If sin A= -1/squareroot of 5 with A in QII, find sin 2A.

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Question 961016: If sin A= -1/squareroot of 5 with A in QII, find sin 2A.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
If sin A= -1/squareroot of 5 with A in QII, find sin 2A
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sin2A=2cosAsinA=2*√5/5*2√5/5=20/25=4/5
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