Answer:
2/3
Step-by-step explanation:
The angles a and b sum to 90°, so they are complementary. A trigonometric identity asserts that cos(90° - a) = sin (a) for any angle a, so cos(b) = sin (a) =
2/ 3 .
78,100
6
6+14=20
40/2+20
Step-by-step explanation:$500.00 20-10%
