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I’m stuck on the following problem (see Attachment) any help would be greatly appreciated
trig identities 2.rtf
I’m not sure how it goes from here to the next line
Thanks
Kind regards
Hi All
Im having a problem with the problem in the attached file
trig identities 2.rtf
any help would be greatly appreciated
Thanks Kind Regards
John
(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: