# Pre calculus

posted by
**Rass**
.

1. convert polar equation to rectangular coordinates:

r^2=4sin2theta

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

posted by
**Rass**
.

1. convert polar equation to rectangular coordinates:

r^2=4sin2theta

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