In right triangle ABC, ∠A and ∠B are complementary angles and sin A = . What is cos B?

How do i work this problem out using the equation a=pe^rt

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12