If the tan A=5/12, with A in Quadrant III, find sec 2A
Added by D. Chance D.
Step 1
Since tan A = 5/12, we can form a right triangle and find the hypotenuse using the Pythagorean theorem. The hypotenuse is sqrt(5^2 + 12^2) = 13. So, sin A = -5/13 and cos A = -12/13 (negative because A is in Quadrant III). Show more…
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