Through what operation(s) does

become

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- November 19th 2012, 05:25 PMGreymalkinTrig factoring
Through what operation(s) does

become

- November 19th 2012, 05:50 PMMarkFLRe: Trig factoring
Observe that the initial expression may be written:

Now factor:

- November 19th 2012, 06:48 PMGreymalkinRe: Trig factoring
- November 19th 2012, 06:56 PMMarkFLRe: Trig factoring
I am rewriting the given fractions using a common denominator of 70.

Once you factor the 1/70 out, then you are left with the numerators of 14 and 5. From there it is a matter of distributing and collecting like terms.