# How do you evaluate #Cos((2pi)/9)#?

It's one of the roots of

has roots

The cube root of a complex number isn't that helpful. It's ambiguous as well.

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you find the exact value of #sin(-90)#?
- How do you evaluate #cos (pi/6) cos (pi/3) - sin (pi/6) sin (pi/3)#?
- What does tan 0 equal?
- If sin s =2/3 and cos s = √5 over 3 what are the values of the remaining four trigonometric functions of s?
- Given a right triangle #triangle ABC# with #C=90^circ#, if b=10, c=26, how do you find a?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7