If 3cosb=4sinb then find sinb
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(3cosb)²=(4sinb)²
9cos²b=16sin²b
9(1-sin²b)=16sin²b
9-9sin²b=16sin²b
9=25sin²b
sin²b=9/25
sinb=√(9/25)
sinb=3/5
9cos²b=16sin²b
9(1-sin²b)=16sin²b
9-9sin²b=16sin²b
9=25sin²b
sin²b=9/25
sinb=√(9/25)
sinb=3/5
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