Posted by **anon** on Sunday, March 6, 2011 at 1:08am.

2- given the curve is described by the equation r=3cos ヨ, find the angle that the tangent line makes with the radius vector when ヨ=120━.

A. 30━

B. 45━

C. 60━

D. 90━

not sure A or D

2.) which of the following represents dy/dx when y=e^-2x Sec(3x)?

A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)<<<< my choice

B.)3e^-2x sec(3x)tan (3x)-2xe^-2x sec(3x)

C.)3e^-2x sec(3x)tan (x)-2e^-2x Sec(3x)

D.)3e^-2x sec(3x)tan (x)-2xe^-2x sec(3x)

3.)calculate dy/dx if y=Ln(2x^3+3x)

A.)1/2x^3+3x

B.)1/6x^2+3

C.)2x^3+3x/6x^2+3

D.)6x^2+3/2x^3+3x <<<< my choice

Thank you!

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