What’s the correct answer i will give brainlist

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

Thee blue triangle has rotated from quadrant i to quadrant iii about the origin. describe the effects of the rotation on the coordinates of the blue triangle.

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row