Saturday

December 20, 2014

December 20, 2014

Posted by **Greg** on Wednesday, November 14, 2012 at 5:43pm.

what value(s) of theta solve the following equation? cos(theta)sin(theta) - 2 cos(theta) = 0?

I let Cos theta = X and sin theta = X

unfortunately I end up with something completely odd. Can anyone help me out please?

- Precalculus 2 -
**Reiny**, Wednesday, November 14, 2012 at 6:35pmcosŲ sinŲ - 2cosŲ = 0

factor it

cosŲ(sinŲ - 2) = 0

cosŲ = 0 ----> Ų = π/2 , 3π/2 (90°, 270°)

or

sinŲ = 2 , which has no solution

so

Ų = π/2 or 3π/2

BTW, how can you let both cosŲ and sinŲ = x ???

that would be true only if cosŲ = sinŲ

**Answer this Question**

**Related Questions**

Calculus - I wanted to confirm that I solved these problems correctly (we had to...

Algebra II - Multiple Choice Which expression is NOT equivalent to 1? (theta) ...

Precalculus(NEED HELP ASAP PLEASE!!) - Solve: sin(theta)cos(theta)-sin(theta)&#...

Algebra II - Which of the following expressions are not equal to 1? A) sin^2 ...

trigonometry - can you correct the rest for me please? Express each as a ...

trigonometry - can you correct the rest for me please? Express each as a ...

trigonomtry - can you correct the rest for me please? Express each as a function...

precalc h - sin(theta)/1-cos(theta) + 1-cos(theta)/sin(theta) = 2csc(theta) That...

Precalculus check answers help! - 1.) Find an expression equivalent to sec theta...

Precalculus check answers help! - 1.) Find an expression equivalent to sec theta...