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If 2sin²x=3cosx if the value of x |
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Answer» Here a mistake cosx=cos60°, x=60° Solving this you get equation 2cos^2x+3cosx-2=0,2cos^2x+4cosx-cosx-2=0,2cosx (cosx+2)-1 (cosx+2)=0, here 2cosx-1=0, cosx+2=0 it is not possible so,2cosx=1, cosx=1/2, cosx=cos45°, x=45° |
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