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April 20, 2014

April 20, 2014

Posted by **Sam** on Wednesday, November 6, 2013 at 7:22am.

I tried this problem but I don't know if this is correct or not. I got 8 cos^4x + 8 cos^2x + 1. Is this right?

Thanks.

- Math - Trigonometry -
**Reiny**, Wednesday, November 6, 2013 at 8:02amThat is correct, good job

- Math - Trigonometry -
**Sam**, Wednesday, November 6, 2013 at 8:37amYay thanks man for the help

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