# Help Solving Precalculus Homework Problems

1. Dec 9, 2008

### doodlebug003

I need help with how to solve these problems on my homework. If you don't know how to do them all then just write the number of the one you know. Thanks so much.

1. arcsin(√3 / 2)=
2. sin^-1(- √2 / 2)=
3. arcos(- 1/2)=
4. tan^-1(√3 / 3)=
5. sin(arctan 3/ 4)=
6. If the sun is 30degrees above the horizon, find the length of a shadow cast by a silo that is 60 feet tall.

2. Dec 9, 2008

### tiny-tim

Welcome to PF!

Hi doodlebug003! Welcome to PF!

Show us what you've tried, and where you're stuck, and then we'll know how to help.

3. Dec 11, 2008

### tiny-tim

:rofl: :rofl: :rofl:

get some sleep! :zzz:​

4. Dec 11, 2008

### HallsofIvy

Staff Emeritus
Since 3< 4, $\sqrt{3}< 2$ and $\sqrt{3}/2< 1$.