Ling X.

asked • 03/31/21

I have several questions for trigonometry. Check description for the questions.

tan(a-b); sina=8/17 for a in quadrant 2 and cosb=-9/41 for b in quadrant 3.


sin(a-b), sina=11/12 for a in quadrant 2 and cosb=15/17 for b in quadrant 4.



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