# How do you prove #cos 3 theta = 4 cos^3 theta - 3 cos theta#?

##### 1 Answer

Write your answer here...

Start with a one sentence answer

Then teach the underlying concepts

Don't copy without citing sources

preview

?

#### Answer

Write a one sentence answer...

#### Answer:

#### Explanation

Explain in detail...

#### Explanation:

I want someone to double check my answer

Trevor Ryan.
Share

Jun 6, 2016

#### Answer:

Proof is given below.

#### Explanation:

Was this helpful? Let the contributor know!

Describe your changes (optional) 200