20.If cos (40° + x) = sin 30°, find the value of χ. – InterviewSolution

1.	20.If cos (40° + x) = sin 30°, find the value of χ.
Answer» cos(40°+x ) = sin 30°cos(40°+x) = 1/2cos(40°+x) = cos 60° 40+x = 60 x= 20°

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