I need Help with ixl ?

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

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

What is the area of the triangle 10 13 12