Precalculus Final Exam

What is the conversion formula from radians to degrees?

Convert $$\frac{11\pi}{6}$$ radians to degrees.

What is the sum of two complex numbers (a + bi) and (c + di)?

Calculate the sum: (3 + 2i) + (4 - 5i)

What is the difference of two complex numbers (a + bi) - (c + di)?

Calculate the difference: (4 - 2i) - (3 + 6i)

What is the sum of the angles in a triangle?

If one angle in a triangle is 50 degrees and another is 81 degrees, what is the third angle?

What is the definition of tangent in a right triangle?

Calculate the tangent of angle X if the opposite side is 30 and the adjacent side is 40.