**How do you verify the identity cos 4x + cos 2x = 2 – 2 sin^2 2x – 2 sin^2 x?**

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## Question “How do you verify the identity cos 4x + cos 2x = 2 – 2 sin^2 2x – 2 sin^2 x?”

How do you verify the identity cos 4x + cos 2x = 2 – 2 sin^2 2x – 2 sin^2 x?

## Answer

Use the trig identification:

## Conclusion

Above is the solution for “**How do you verify the identity cos 4x + cos 2x = 2 – 2 sin^2 2x – 2 sin^2 x?**“. We hope that you find a good answer and gain the knowledge about this topic of **trigonometry**.