Wednesday

August 27, 2014

August 27, 2014

Posted by **John** on Friday, December 16, 2011 at 2:55am.

tan2x+1=0

My answers: 22.5, 157.5, 202.5, 337.5

Textbook: 67.5, 157.5, 247.5, 337.5

I don't understand. Am I wrong?

Thanks for your help.

- Math (URGENT) -
**Damon**, Friday, December 16, 2011 at 5:01amtan 2 x = -1

tan is negative in quadrants 2 and 4

2x = 135, 315, 495, 675

now divide those by 2

**Related Questions**

Math - Find the five-number summary of the following set of numbers. 337, 248, ...

Trigonometic - Solving Trigonometic Equations solve for x : 1)sinx = (4/5) 2) ...

College Chemistry - Calculate the electrode potential of a copper half-call ...

Trigonometry - Am I doing something wrong? I have to use the Law of Consines ...

Physics - Satna has delivered gifts to the good Atlatean children. Now his ...

physics - A 16.3 kg block is dragged over a rough, horizontal surface by a ...

math 157 - If P(A)= 1/2, P(B)= 1/6 and P(A and B)= 1/2, what can you say about P...

Math - Solving for Trig Equations - Solve the following equation for 0 less than...

Pre-Calculus - A manufacture has been selling 1050 television sets a week at 360...

math - how do i write $3,337.55 on a check in words on?