Find the value of x. Write your answer in simplest form. please please help and try to explain good​

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Write the following as a base and exponent

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)?