I’m stuck on the following problem (see Attachment) any help would be greatly appreciated

Attachment 18487

I’m not sure how it goes from here to the next line

Thanks

Kind regards

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- Aug 9th 2010, 01:53 PMJCM133trig identities
I’m stuck on the following problem (see Attachment) any help would be greatly appreciated

Attachment 18487

I’m not sure how it goes from here to the next line

Thanks

Kind regards - Aug 9th 2010, 02:31 PMskeeter
you need to review your post ...

- Aug 9th 2010, 03:00 PMJCM133Trigonometric Identities
Hi All

Im having a problem with the problem in the attached file

Attachment 18488

any help would be greatly appreciated

Thanks Kind Regards

John - Aug 9th 2010, 04:19 PMeumyang

(I rearranged the factors in the last term to make it consistent.)

Distribute the 2:

Note that each term begins with or . Recall the sine of a double angle identity: So

, and the same for angle phi.

Replace:

Rearrange:

Factor:

Use the Pythagorean identity:

- Aug 9th 2010, 11:14 PMJCM133
Thanks EUMYANG that has helped a bundle

kind regards

John