Wednesday

April 1, 2015

April 1, 2015

Posted by **jennifer** on Monday, April 7, 2008 at 12:20am.

... Does anyone know what these are?

Thanks!

- trig -
**drwls**, Monday, April 7, 2008 at 12:37amI would say they are the definitions of tan, cot, sec and csc in terms of sin and cos,

tan = sin/cos

cot = cos/sin

csc = 1/sin

sec = 1/cos

sin^2 + cos^2 = 1

the law of sines

the law of cosines

sin (a + b) = sin a cos b + cos b sin a

cos (a + b) = cos a cos b - sina sin b

tan (a + b) =

(tan a + tan b)/[1 -(tan a tan b)]

Others may differ

**Answer this Question**

**Related Questions**

Trig - I was just wondering if anyone can explain the Law of Sines- "Ambiguity ...

trig - rules of logarithms: can someone please explain how to do these problems...

Easy (yet confusing) Algebra - These problems are pretty easy, but confusing (as...

language infinitives - Some facts are easy enough to memorize. to memorize is ...

Super Easy Science - SUPER SIMPLE QUESTION!!!!! - how do I do i stay focused ...

math,help - can someone explain to me also how to do addition with equations. ...

Trig - Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e...

trig - I am currently taking a trig class. I need help understanding how to ...

10th grade - HOW DO YOU YOU ADD ALL THE HEARD MATH WITH THE EASY

Math - ok we got this packet that has an answer key and we g0tta show our work ...