Trignometry Rules/properties/common equations?

[Master7731]

Homework Statement

What are the other Trignometry Rules/properties/common equations?

The Attempt at a Solution

cos2 theta + sin2 theta = 1
1 + tan2 theta = sec2 theta
1 + cot2 theta = csc2 theta
2sin theta = 2cos theta sin theta

 

[Pengwuino]

http://en.wikipedia.org/wiki/List_of_trigonometric_identities

 

[Master7731]

Thanks so much...But I'm unsure of what you said about the e-mailing the site admin

 

[Pengwuino]

Thanks so much...But I'm unsure of what you said about the e-mailing the site admin

It's my signature, it's just a joke, don't mind it :)

 

[Master7731]

Lol gotcha...thanks again