4 x 4 =
What is the answer

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)

Find the amplitude of a sinusoidal function that models this temperature variation