Step-by-step explanation:
15. If A and B are complementary angles, then sin A = cos B and cos A = sin B.
So if sin A = m, then cos B = m.
16. If sin A = cos B, or cos A = sin B, and A and B are acute, then A and B are complementary.
a. cos 60° = sin θ
60° + θ = 90°
θ = 30°
b. sin 71° = cos θ
71° + θ = 90°
θ = 19°
c. sin θ = cos (θ + 20°)
θ + θ + 20° = 90°
2θ = 70°
θ = 35°
d. sin (θ − 60°) = cos θ
θ + θ − 60° = 90°
2θ = 150°
θ = 75°
Answer: 10
Step-by-step explanation:
hope this helps!
Answer:
2
Step-by-step explanation:
Answer:
4.41
Step-by-step explanation:
you multiply 2.1 times 2.1
Answer:
sin C = 7/25
cos C = 24/25
tan C = 7/24
Step-by-step explanation:
opposite of C = 7
adjacent of C = 24
hypotenuse of C = 25
sin = opposite / hypotenuse
so sin C = 7/25
cos C = adjacent / hypotenuse
so cos C = 24/25
tan = opposite / adjacent
so tan C = 7/24
