Posted by **Steve** on Thursday, December 17, 2009 at 9:31pm.

Find all solutions of the equation:

2 cosx + sqrt2 = 0

A) x = ð/4 + 2nð or x = 7ð/4 + 2nð

B) x = 3ð/4 + 2nð or x = 5ð/4 + 2nð

C) x = ð/4 + nð or x = 7ð/4 + nð

D) x = 3ð/4 + nð or x = 5ð/4 + nð

- trig -
**bob**, Thursday, April 24, 2014 at 7:22pm
this is in 3 grade?

- trig -
**john**, Wednesday, May 13, 2015 at 3:59pm
that is NOT a 3rd grade equation, but nice try. I would help you, but you are not in third grade, there for you can figure it out. I am in fourth grade Cambridge and I only know that because I looked it up. and when you first look it up, you will find yourself!!!! you have to go to the calculator... if you are even allowed to use it in... what twelfth grade?

## Answer this Question

## Related Questions

- trig - Find all solutions of the equation: cot x sec x = 2 cot x. A) x = 2ð/3 + ...
- math - 1. unite similar terms with parenthesis. x=2 y=-3 and z=5 find the value ...
- Math 8R - Help!!!!!!!! - The expression 2(8a to the 2nd power + a - 1) + 3(a + 3...
- trig - how do you solve 2nd cos 6/11 (my calculator doesn't have 2nd function0
- Algebra - Factor each of following expressions x (4th power) - x (3rd power) - ...
- Music - 2. What is the 2nd scale degree of D flat major? is it G flat? 8. The ...
- Help! - I am stumped with a problem we are supposed to help our 4th grader with...
- 2nd Grade Math - What is the best way to explain 2nd grade kid, how to find one ...
- Math/Check - 59.(3x+7)(5x-2) A.8x+h B.8x(to the 2nd power)+29x_14 C.15x(to the ...
- physics - a man weighs 573 n on earth. what would he weigh on Jupiter, where the...