Question

Which of the following is equivalent to tan(44˚)+tan(55˚)1−tan(44˚)tan(55˚)?

Question 7 options:

tan(−99˚)

tan(99˚)

tan(11˚)

tan(−11˚)

Answer 1

tan(99°)

Explanation:

It looks like you may have attempted to write the sum of angles formula for tangent. That would be ...

tan(α+β) = (tan(α) +tan(β))/(1 -tan(α)tan(β)) . . . . . . . parentheses are required

Your expression seems to match this for α = 44° and β = 55°. So, the equivalent is ...

tan(44°+55°) = tan(99°)