4 [sin" x.sin nx) = A)n sinn-1 x.si...
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4 [sin" x.sin nx) = A)n sinn-1 x.sin(n+1)x C) nsinn- x.sin(n-1)x [ log ] = .

JEE/Engineering Exams
Maths
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( begin{aligned} & frac{d}{d x}left[sin ^{n} x cdot sin n xright] =& n sin ^{n-1} x sin n x cos x+sin ^{n} x cdot cos n x cdot eta =& n cdot sin ^{n-1} x[sin x cos x+cos n x sin x] =& n cdot sin ^{n-1} x sin (n x+x) &=n cdot sin ^{n-1} x cdot sin (n+1) x_{1} / 1 end{aligned} )
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