# Just a quick equation (sin^3)

1. Sep 17, 2009

### lagwagon555

1. The problem statement, all variables and given/known data

Solve the equation x = (1.66x10^28)/(sin^3(45))

2. Relevant equations

n/a

3. The attempt at a solution

My attempt is really non existent, since I haven't had to work with sin^3 before, I haven't even seen it before this assignment. Basiclly I'm working out the mass of a binary star using the sin^3 method, and this is the last stage. The rest of the question has nothing to do with this bit I'm stuck on, so I don't think it's worth posting. Can anyone tell me how I'd go about solving this equation? Thanks!

2. Sep 17, 2009

### Staff: Mentor

Isn't $$sin^3(A) = sin(A)*sin(A)*sin(A)$$ ?

http://thesaurus.maths.org/mmkb/entry.html?action=entryById&id=2723 [Broken]

You should be able to just calculate x with your calculator, I believe...

Last edited by a moderator: May 4, 2017
3. Sep 17, 2009

### lagwagon555

Haha, not my brightest moment ever. Thanks for clearing that up!