# Calculus

posted by
**anon** on
.

1.evaluate (integral sign)x cos 3x dx

A.1/6 x^2 sin 3x + C

B.1/3 x sin 3x -1/2 sin 3x +C

C.1/3 x sin 3x +1/9 cos 3x +C << my choice.

D. 1/2 x^2 +1/18 sin^2 3x +C

2.evaluate (integral sign)xe(power of 2x)dx

A.1/6 x^2 e(to the power of 3x)+C

B.1/2 xe(to the power of 2x)-1/2 e(to

the power of 2x)+C

C.1/2xe(to the power of 2x) -1/4 e(to the power of 2x) +C

D.1/2 x^2 -1/8 e(to the power of 4x +C

I don't know the answer to this one.