# Calculus II

How do you integrate the function -- > sinx (4^cosx) from 0 to pi/2

I did "u-substitution" to make it the integral from 1 to 0 of 4^u but then i don 't know where to go from there! Thank you

1. 👍 0
2. 👎 0
3. 👁 77
asked by Mary
1. INT 4^u du

what is the integral of a^u du?

Ans: a^u / lna

check that.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Trig........

I need to prove that the following is true. Thanks (cosx / 1-sinx ) = ( 1+sinx / cosx ) I recall this question causing all kinds of problems when I was still teaching. it requires a little "trick" L.S. =cosx/(1-sinx) multiply top

asked by abdo on April 18, 2007
2. ### Calculus

Integrate sinx(cosx)^2dx using the substitution u=sinx. I know how to do this using u =cosx, but not sinx. The next problem on the homework was the same question except it asked to use u=cosx, so there couldn't have been a

asked by Larry on December 23, 2015
3. ### Trigonometry Check

Simplify #3: [cosx-sin(90-x)sinx]/[cosx-cos(180-x)tanx] = [cosx-(sin90cosx-cos90sinx)sinx]/[cosx-(cos180cosx+sinx180sinx)tanx] = [cosx-((1)cosx-(0)sinx)sinx]/[cosx-((-1)cosx+(0)sinx)tanx] = [cosx-cosxsinx]/[cosx+cosxtanx] =

asked by Anonymous on February 20, 2012
4. ### Pre-Calc

Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= tanx + secx My work so far: (sinx/cosx + 1/cosx + cosx/cosx)/(sinx/cos x - 1/cosx + cosx/cosx)= tanx + cosx (just working on the left side) ((sinx + 1 -

asked by Dave on January 2, 2007
5. ### Math

dz =(−sinx + 2xy^2)dx +(2x^2 y)dy Integrate the differential to find the function z. Would I say that z was equal to two separate differentials and integrate the first part of the function with respect to x and the second part

asked by Clare on May 17, 2009
6. ### Trigonometry.

( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! Generally these are done by changing everything to sines and cosines, unless you see some obvious identities. Also generally, it is best to start with the more complicated

asked by mo on April 18, 2007
7. ### Calculus

determine the absolute extreme values of the function f(x)=sinx-cosx+6 on the interval 0

asked by Sara on February 15, 2015
8. ### trigonometry

can i use factoring to simplify this trig identity? the problem is sinx + cotx * cosx i know the answer is cscx and i know how to get it but i want to know if i can do factoring to get it bc i tried to but it wont give me the

asked by v on December 3, 2012
9. ### maths - trigonometry

I've asked about this same question before, and someone gave me the way to finish, which I understand to some extent. I need help figuring out what they did in the second step though. How they got to the third step from the

asked by anonymous on June 19, 2010
10. ### Simplifying with Trigonometry Identities

Hi, I am a senior in High School having a really difficult time with two problems. I have to prove using the trigonometric identities that they equal each other but I am having a really hard time trying to get them to equal each

asked by amanda on March 7, 2007
11. ### Math

integrate (sinx)^(5)(cosx)^(12)from 0 to (pi/2) I'm having problems just even integrating it... I tried breaking it up (sin^(2)x)^(2)(cos^(2)x)^(6)(sinx)dx then doing u-sub with u=cosx and du= -sinx but then I get stuck... the

asked by emath on February 23, 2010

More Similar Questions