Wednesday

October 22, 2014

October 22, 2014

Posted by **Anonymous** on Thursday, November 22, 2007 at 9:01pm.

--

2cosx - 3 = 0

--

I first isolated for "x"

2cosx-3 = 0

(2cosx/2) = (3/2)

x = cos^-1(3/2)

x = error? why?

--

My textbook answer:

30 and 330 degrees

--

- Math - Solving for Trig Equations -
**Reiny**, Thursday, November 22, 2007 at 10:08pmMake sure you copied the question correctly.

The way it stands

cos x = 3/2 has indeed no solution

(the sine and cosine function does not exceed a value >1 or < -1

**Answer this Question**

**Related Questions**

math (trig) - Im having problems solving this equation: 2sin(x) = cos(x) + 2 I ...

Algebra - - ok... we keep getting this one wrong: Solve the following equation ...

Math - How do I write the Symmetric Equation of a line given the following ...

Math - How do I write the Symmetric Equation of a line given the following ...

College Algebra - Solve the system of equations with ROWOPS program. I know how ...

math - Solve by elimination method. 2r-5s=-33 5r+2s=48 I keep getting different...

math - Use the intersect command on a graphing utility to solve the following ...

Mathj C30 - Solving Equations Containing Circular Functions : Solve 2cosx sinx...

Trig - h t t p : / / m a t h c e n t r a l . u r e g i n a . c a / Q Q / d a t a...

Linear Equations - Can you please help solve this equation using the ...