Write as a single function of a single angle tan (-34*)- tan (110*)
=
1+ tan (-34*) x tan (110*)​

Does anyone know this? the andwer choices are: 79, 85, 101, and 135 degrees!

Geometry answer picture question pls . reason and statements

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)