In right triangle abc, angle a and angle b are complementary angles. the value of cos a is 5/13. what is the value of sin b.

cos is . So, if cos(a)= then use Pythagorean Theorem to determine the length of the "opposite" side.

5² + x² = 13²

25 + x² = 169

      x² = 144

       x = 12

Now that you know the length of the opposite side, you can plug it in for sin.

sin is . So, sin(a) =

Now, if you switch so you are looking for sin(b), the cos and sin also switch.

cos(b) = sin(a) =

sin(b) = cos(a) =

sin(b) =

every 5 customers that walk in, only 2 buy popcorn.

step-by-step explanation:

basically 2/5.

brainliest would be appreciated.