16.If cos 3x = sin 2x , then x is-a) 150 , b) 300, c) 22.50, d) 180 – InterviewSolution

1.

16.If cos 3x = sin 2x , then x is-a) 150 , b) 300, c) 22.50, d) 180

Answer»

Sin(2x) =cos(3x)using trigonometric property

Sin(2x)=sin(90–3x)

Taking sin inverse on both sides

2x=90–3x

5x=90

X=18

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