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Prove that sin^2(n+1)A-sin^2nA=sin(2n+1)...

Prove that `sin^2(n+1)A-sin^2nA=sin(2n+1)AsinA`

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`sin^2(n+1)A-sin^2nA`
`=sin(nA+A+nA)sin(nA+A-nA)`
`=sin(2n+1)A cdot sinA`
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PATHFINDER-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-QUESTIONBANK
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