Find the surface area of the figure.​

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

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?