If a cosP + b sinQ = c and the solution of the eqation are D , F then prove that , sin( D+F)=(2ab÷(a 2 +b 2 ) )

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If a cosP + b sinQ = c and the solution of the eqation are D , F then prove that , sin( D+F)=(2ab÷(a 2 +b 2 ) )

If a cosP + b sinQ = c and the solution of the eqation are D , F then prove that , sin( D+F)=(2ab÷(a² +b²) )

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If a cosP + b sinQ = c and the solution of the eqation are D , F then prove that , sin( D+F)=(2ab÷(a 2 +b 2 ) )

If a cosP + b sinQ = c and the solution of the eqation are D , F then prove that , sin( D+F)=(2ab÷(a2 +b2 ) )

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If a cosP + b sinQ = c and the solution of the eqation are D , F then prove that , sin( D+F)=(2ab÷(a² +b²) )