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Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi