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The number of solution in [0,pi//2] of t...

The number of solution in `[0,pi//2]` of the equation `cos3xtan5x=sin7x` is `5` b. `7` c. `6` d. none of these

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Given,`cos3xtan5x=sin7x`
=`cos3x(sin5x)/(cos5x)=sin7x`
=`2 cos 3x sin 5x = 2 cos 5x sin 7x`
=`sin 8x + sin2x = sin 12x + sin 2x`
=` sin 8x = sin12x `
=`sin 12x - sin8x = 0 `
...
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