# Can you simplify # cos(x)cos(2x)cos(4x)cos(8x)cos(16x) ... cos(2^n x) # ?,

##### 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

Øko
Share

Feb 8, 2018

#### Answer:

#### Explanation:

We want to simplify

The trick is to use the double-angle identity repeatedly

#sin(2x)=2cos(x)sin(x)#

Consider the following example

If we generalize it

Was this helpful? Let the contributor know!

Describe your changes (optional) 200