differentiate with respect to X
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1) y=log(secx+tanx)
dy/dx = [1/(secx+tanx)*d(secx+tanx)/dx
=( 1/secx+tanx)*secxtanx+sec^x
= (1/secx+ tanx)*secx(secx+tanx)
=secx
2)y=e^xsinx
dy/dx= e^xsinx(xcosx+sinx)
3)y=(sinx^3)^-1
dy/dx=(1/√1-x^6)*3x^2
dy/dx = [1/(secx+tanx)*d(secx+tanx)/dx
=( 1/secx+tanx)*secxtanx+sec^x
= (1/secx+ tanx)*secx(secx+tanx)
=secx
2)y=e^xsinx
dy/dx= e^xsinx(xcosx+sinx)
3)y=(sinx^3)^-1
dy/dx=(1/√1-x^6)*3x^2
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