Saturday

January 31, 2015

January 31, 2015

Posted by **Greg** on Wednesday, November 14, 2012 at 3:12pm.

I try plugging in different numbers but I am not sure exactly what I am looking for in order to solve?

- Trigonometry -
**Reiny**, Wednesday, November 14, 2012 at 3:50pmcos^2 Ų - cosŲ - 6 = 0

let cosŲ = x , then we get

x^2 - x - 6 = 0

(x-3)(x+2) = 0

x = 3 or x = -2

then cosŲ = 3 or cosŲ = -2

both of these are not possible, since the cosine is defined only between -1 and +1

there is no solution to your equation

- Trigonometry -
**Steve**, Wednesday, November 14, 2012 at 4:43pmalso, you coul dhave reasoned thus:

cos^2θ <= 1

-1 <= cosθ <= 1

no way could you have cos^2θ - cosθ = 6

**Answer this Question**

**Related Questions**

Precalculus 2 - Similiarly to a question I asked previously I took the same ...

Trigonometry - Okay, I have been given a trigonometric equation to solve (sin^2(...

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

Math - Trigonometry - Let f(x) be a polynomial such that f(cos theta) = cos(4 ...

Mathamatics - Solve the following trigonometry identities. a) 1-cos2(theta) = ...

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 ...

Trigonometry - Thank you STEVE!!!!! Suppose that Cos (theta) = 1/square root 2 ...

Physics - An object is shot at 20m/s at an angle theta. The object lands 24m ...

Maths- complex numbers - Find tan(3 theta) in terms of tan theta Use the formula...