if sin a =a÷b find cos a
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Answer:
sin ^2A +cos^2A=1
cosA=√1-sin^2A
√1-(a÷b)^2
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Answer:
sin A = a ÷ b
cos A = √ 1- sin^A
= 1 - √a ÷ b ^
= b^ - a^ ÷ 2
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