4sin(x-20degrees)=5cosx
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sin(x-20) = (5/4)cosx sinxcos20-cosxsin20=(5/4)cosx sinxcos20 = cosx(5/4+sin20) sinx/cosx = (5/4+sin20)/cos20 So tanx = (5/4+sin20)/cos20 x = 59.45
brilliant thank you
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