Posted by **George** on Wednesday, July 13, 2011 at 4:59am.

ok so I'm learning to solve problems like

cos(x)=2

and

sin(x)=5

I've wrapped my head around the process required to do so and I must say my brain is like @_@ mosh right now. Whenever I ask this question I never get a direct answer. I understand it's important to be able to define such angles and that this field of math is a valid field and worth studying but why??? Why would I ever need to know how to do this? Like it really hurts my head and I don't see when I would ever need to be able to solve such a problem in real life other than a text book...

- MATH -
**Anonymous**, Wednesday, July 13, 2011 at 5:27am
55-65

- MATH -
**MathMate**, Wednesday, July 13, 2011 at 5:58am
I agree with you... I will not be able to solve for x either, when I am given

cos(x)=2, or sin(x)=5.

The reason is because for *any* real value of x, cos(x) and sin(x) vary between -1 and +1. This means that the solutions to the two given equations do *not* exist!

I hope you have not made a typo, unless your teacher is training you to think outside of the box.

As to whether you'll ever going to need to know how to solve these problems, it all depends on what you want to do later in life. If you want to flip burgers for the rest of your life, you will never need to know this stuff. If you will be doing renovations, landscaping, and a whole lot of "ordinary guy" jobs, this skill will definitely help you.

- MATH -
**MathMate**, Wednesday, July 13, 2011 at 6:10am
By the way George, you said you have done the programming exercises for the whole computer programming textbook before classes even started, you could not possibly have this cos(x) problem bother you, could you?

May I also add computer programming as one of the areas where trigonometry would be a definite asset?

## Answer This Question

## Related Questions

- TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
- Precal - I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...
- Math - Solve this equation algebraically: (1-sin x)/cos x = cos x/(1+sin x) --- ...
- Math - Calculus - The identity below is significant because it relates 3 ...
- Trigonometry - I need help with I just can't seem to get anywhere. this is as ...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- Calculus - MathMate Please help - ok, i tried to do what you told me but i cant ...
- Trigonometry - Solve the trigonometric equations. 1.) SIN²x(CSC²x-1) 2.) COT x ...
- Trigonometry - I need to prove that the following is true. Thanks. csc^2(A/2)=...
- Trigonometry - Hello all, In our math class, we are practicing the trigonometric...

More Related Questions