Solve the equation cotx=4 in the interval 0<(smaller and equal to)x<<(larger and equal to)2pie

Answer 1

If cot x =- 4, tan x = 1/4.

The tan function is positive in the first and thrid quadrants.

In the first quadrant, the angle would be arctan 0.25 = 14.04 degrees. There is another solution in the third quadrant. See if you can figure it out.