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cos(thetha)*cos(thetha/2) - sine(thetha)*sine(thetha/2) + sin(thetha)*cos(thetha/2) + cos(thetha)*sine(thetha/2) = cos(3*thetha/2) + sine (3*thetha/2) . Proof is needed to show LHS=RHS
Dear studentCos (a+b) = cos a cos b - sin a sin bSin ( a+ b) = sin a cos b + cos a sin bApply these equations in the questionLhs = cos ( theta + theta*0.5) + sin ( theta + 0.5 theta ) = RHSHENCE PROVEDRegards
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