Wednesday

January 28, 2015

January 28, 2015

Posted by **Rass** on Wednesday, January 18, 2012 at 6:29pm.

r^2=4sin2theta

2. find the coefficient of x^5 in the expansion (x+2)(x+1)^8

- math 12th grade -
**Rass**, Wednesday, January 18, 2012 at 6:44pmAnyone please help

- math 12th grade -
**Steve**, Wednesday, January 18, 2012 at 11:53pmx^2 + y^2 = r^2

x = rcosθ

y = rsinθ

r^2 = 4 sin2θ

r^2 = 8sinθcosθ

r^2 = 8 * y/r * x/r

r^4 = 8xy

(x^2 + y^2)^2 - 8xy = 0

(x+1)^8 = x^8 + 8x^7 + 28x^6 + 56x^5 + 70x^4 + ...

(x+2)(x+1)^8 = ... + 70x^5 + ... + 112x^5 + ...

= ... + 182x^5 + ...

**Answer this Question**

**Related Questions**

Pre calculus - 1. convert polar equation to rectangular coordinates: r^2=...

Math ! Please Help ! - 1.Graph the polar equation r=3-2sin(theta) 2. Find the ...

Pre-calculus; urgent ! Please help ! - 1.Graph the polar equation r=3-2sin(theta...

Calculus please help ! - 1.Graph the polar equation r=3-2sin(theta) 2. Find the ...

pre calc.Math - Please help me any one of these please! Thank You to any one r=...

precalculus - convert the equation y^2 = 2x -x^2 into polar form. convert the ...

MATH - I have a test in about an hour and a half and am having some difficulty ...

Trig (math) - 1.) Find all solutions of the equation. Leave answers in ...

MATH - convert polar equation to rectangular coordinates: r^2=4sin2(theta)

Calculus - Convert the polar equation to rectangular coordinates: r = 2-cos ...