Could someone please help me with this answer thank you!

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

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

How do i put 3(x+7) in distributive property