Posted by **anon** on Sunday, March 6, 2011 at 12:38am.

1.)Find dy/dx when y= Ln (sinh 2x)

my answer >> 2coth 2x.

2.)Find dy/dx when sinh 3y=cos 2x

A.-2 sin 2x

B.-2 sin 2x / sinh 3y

C.-2/3tan (2x/3y)

D.-2sin2x / 3 cosh 3yz...>> my answer.

2).Find the derivative of y=cos(x^2) with respect to x.

A.-sin (2x)

B.-2x sin (x^2)<<<< my answer.

C.-sin (2x) cos (x^2)

D.-2x sin (x^2) cos (x^2)

3).Find the derivative of y=sin^2(4x) cos (3x) with respect to x.

A. 8 sin (4x) cos (3x) - 3 sin^2 (4x) sin (3x)

B. 8 cos (4x) cos (3x) - 3 sin^2 (4x) sin (3x)

C. 8 sin (4x) cos (4x) cos (3x) - 3 sin^2 (4x) sin (3x)<<<<<my choice .not sure though

D. 8 sin (4x) cos (4x) cos (3x) - 3 sin^2 (4x) sin (3x) cos (3x)

4).Find the derivative of y=e^bx2 with respect to x

A.be^bx^2

B.bxe^bx^2

C.2 bxe^bx^2 <<<<< my choice

D.bx^2 e^bx^2

5).Calculate dy/dx when y=(x^2+2)e^4x as the derivative of a product,letting u=x^2+2 and v=e^4x. Which of the following is a step in your solution

A.du/dx=2x+2

B.du/dx=2x <<< my choice

C.dv/dx=4xe^3x

D.dv/dx=4xe^4x

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