- #1
Jimmy84
- 191
- 0
Homework Statement
I forgot how to divide this
1.) x^2 + 15 -8x divided by 3 - x
I don't know how to start since 3 has nothing to do with x^2.
The result from the book is 5 - x.
I also don't understand this problem which uses trigonometric identities.
if x = a sin theta then
2.) square rt of a^2 - x^2
= square rt of a^2 - a^2 sin^2 theta
= square rt of a^2 square rt of 1 - sin^2 theta
= a cos theta .
I don't understand why does
square rt of a^2 - a^2 sin^2 theta
= square rt of a^2 square rt of 1 - sin^2 theta ?
Homework Equations
The Attempt at a Solution
Thanks in advance.