SOLUTION: Solve the equation (sinA = cos(A + 20))
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Question 611743: Solve the equation (sinA = cos(A + 20))
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Solve the equation (sinA = cos(A + 20))
sinA=cos(A+20)
sinA=cosAcos20-sinAsin20
sinA+sinAsin20=cosAcos20
sinA(1+sin20)=cosAcos20
sinA/cosA=cos20/(1+sin20)
tanA≈.70
A=34.99º
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