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Find the value of the trigonometric function $\,\sec(v-u)\,$ given that

$$\sin u=−\frac{20}{29}\;\;,\;\; \cos v =−\frac{3}{5}$$

(Both u and v are in Quadrant III.)

Thanks!

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    NO! First wait until you understand how to do the other problem you have posted, which is very, very much like this one. Then, when you have digested that other problem, try this one again --- I bet you'll be able to do it! And, if you can't, *that's* the time to come back and ask for clarification!2012-10-29

3 Answers 3