Friday

April 18, 2014

April 18, 2014

Posted by **David M.** on Wednesday, April 28, 2010 at 7:36pm.

- Math -
**Damon**, Wednesday, April 28, 2010 at 8:01pmwell, 7 pi/6 is 180 + 30 degrees

and 7 pi/6 = twice 7 pi/12

we know sin and cos of 7 pi/6

sin 7 pi/6 = -1/2

cos 7 pi/6 = -(1/2)sqrt3

so now you should be able to find the sin of 7 pi/12

**Related Questions**

Math- Trig - 1. Determine the exact value of cos^-1 (pi/2). Give number and ...

MATH - 1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL ...

precal - use the half angle formula to determine the exact values of sin, cos, ...

Math (Calc) - Find the Exact value of Pi/24. I'm not sure whether to use a half-...

math - Eliminate the parameter (What does that mean?) and write a rectangular ...

trig - Use a half-angle formula to find the exact value of cos 5ð/12

Calculus - I had this on a test: Use the half-angle formula to find the exact ...

Pre-calculas Math - how to find the exact value of: cos(9*pi/12)*cos(5*pi/12)+...

Math - Use the half formula to find the exact value of the expression sin 22.5

Trig - How do i find the exact value of sin 15 using the half angle formula