What is cos⁡x×cos⁡2x?

Mason Cherry

Mason Cherry

Answered

2023-01-01

What is cosx×cos2x?

Answer & Explanation

heyitsrover017

heyitsrover017

Expert

2023-01-02Added 6 answers

Use trig identity:
cosa.cosb=(12)cos(ab)+(12)cos(a+b)
cosx.cos2x=(12)cos(2xx)+(12)cos(x+2x)
=cosx2+cos3x2

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get your answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?