Creati deleted 63 of my friend 0090086 questions out of which 32 were brainliest please help him and friend him

anyways the question is in the pic below

wrong answer will be deleted

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?