Find the derivative of 4sinx(6cosx+9sinx) at x=¦Ð/6.

Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under the square root sign. this i...

Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under the square root sign. I get...

solve for x 6tanx - 4sinx = 1 i tried it but got a quartic formula :S 16sin^4x + 8sin^3x +...

f(x)=4sinx/1+cosx find f'(x) this is what i got and i dunno what i did to get it wrong (4...

If f(x)=4sinx/1+cosx then f'(x)=_____? I think that the derivative of 4sinx would be 4cos and...

3cosx+4sinx=5 what is x is too difficulat form me to solve? Shw working please

4sinx-5cosx+3sec²x

Find the derivative of y=3x^2Cos 2x

Find the derivative of a)y=3x^2Cos 2x b)y=cot5x c)y=2x^3+4x^2-3x+5

FIND the first derivative of the following functions without necessarily using the first principle...

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