Tuesday

September 23, 2014

September 23, 2014

Posted by **Sophie** on Friday, August 14, 2009 at 9:16pm.

Evaluate tan 7.5

Part 2)

Evaluate exactly cos (-(45pi(4)))

- Trig problems -
**drwls**, Friday, August 14, 2009 at 9:53pm1. I recommend usng a calculator (in radians mode) or search Google with

< tan 7.5 = > in the search window.

2. Remember that you can subtract multiples of 2 pi from the argument of any trig function and get the same answer.

-45 pi*4 = -180 pi; the cosine of that is the same as the cosine of zero.

**Answer this Question**

**Related Questions**

Math - Evaluate exactly cos(-(45pi/4))

Inverse Functions & Trig. Equations - 7. Evaluate sin[sin^-1(-1/2)]. a. 1/2 b...

trig - how do i evaluate using formulas? i did almost the entire thing, but i ...

Math - Evaluate *Note - We have to find the exact value of these. That I know to...

Precalc/Trig - evaluate the expression assuming that cos(x)=1/7, sin(y)=1/3, sin...

math - i need some serious help with limits in pre-calc. here are a few ...

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...

Trig. - sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times...

Trig - Use the given information to evaluate sin (a+b). Exact answers only. No ...

Trig - Use the given information to evaluate sin (a+b). Exact answers only. No ...