A particular sound wave can be graphed using the function y = -1 sin 5x. Find the period of the function.

m∠a is 90°

m∠b is 40°

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x