Question

find the derivatives of trigonometric functions:

1. y= secx/x 2. y=xsinx+cosx 3. x^2tanx

Answer 1

y =secx/x
Use quotient rule of derivatives
dy/dx =(x(d/dx sec x)-secx(d/dx x))/x^2
=(xsecxtanx-secx)/x^2
=secx(xtanx-1)/x^2

Source: http://www.mathskey.com/question2answer/

Answer 2

2. use the product rule for x sinx

Answer 3

3 product rule again

Answer 4

2. x * d(sinx)dx + 1*sin x + d(cosx)/dx
= x cos x + sin x - sin x
= x cosx

Answer 5

3 x^2 d(tanx)/dx + 2x * tanx

can you continue with this?