# Trigonometry Homework Help Online Trigonometry Assignments

Then find all trigonometric functions by using identities, where A lies in 3rd quadrant. Given: tan A frac34, step 1: tan A frac34 (given) we know that, cot A frac1tan A frac43 cot A frac43, step 2: We know that, sec2 A 1 tan2A sec2 A 1 (frac34)2 1 frac9 16 frac25 16 sec A pm frac5 4 or sec.
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