Posted by **Akash** on Friday, June 10, 2011 at 1:27am.

If y = e^x cosx, prove that dy/dx sqrt(2) e^x . cos(x+ pie/4)

## Answer this Question

## Related Questions

- Class 12th : Calculus - If y = sqrt(x-1)+sqrt(x+1),prove that sqrt(x^2-1)dy/dx=...
- Pre-Calc - Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= ...
- Trig - prove the identity (sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= ...
- Calculus - Find the derivative of cos(sqrt(e^(x^3)cos(x)) I got -sin(sqrt(e^(x^3...
- Calculus - Please look at my work below: Solve the initial-value problem. y'' + ...
- RESPONSE to PreCalc Question - h t t p : / / w w w . j i s k h a . c o m / d i s...
- Calc II - For the following question, we need to find the length of the polar ...
- Calculus grade 12 - solve for (<_ = less than or equal to / pie = pie sign...
- Geometry - Find 2 cos(x/2) sin(x/2) when x = -π/6. I know that cos(x/2...
- Calculus - solve this equation on the given interval expressing the solution for...