cos- -cos- 2- sin- -sin- 2-bcos 2 - -2 Find b

L.H.S. = ( cosα +cos nbsp; β )^2+ ( sinα +sin nbsp; β )^2 nbsp; nbsp; nbsp; nbsp; nbsp; nbsp; ={ 2cos ( α +β/2 )cos nbsp; ( α β/2 ...

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Principal Solution of Trigonometric Equation

cosα +cosβ 2+...

Question

${(cos α + cos β)}^{2} + {(sin α + sin β)}^{2} = b {cos}^{2} (\frac{α - β}{2})$ Find b

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