Question

Write tan inverse a + tan inverse b formula.

Answer 1

tan inverse a+ tan inverse b =

tan inverse ((a+b)/1-a*b)

Hope it helps you!!!

Answer 2

The inverse for tangent is cotangent. Tangent trigonometric function is negative when sine and cosine are negative and one of the function lies in second quadrant or fourth quadrant. The tangent function is positive when both the sine and cosine angle lies in the first or third quadrant. They take up four quadrants based on their sign change in cosine and sine.

The formula for $a+b=(\frac{a+b}{1-ab})$