The given formula is a sinusoidal equation. Sinusoidal equations are trigonometric functions involving sine and cosine functions. Graphically, they look like wave patterns having amplitudes and periods. The general form of a sinusoidal equation is

y = A cos(Bx + C) + D

where

A = amplitude

B = frequency

C = shift on starting angle

D = shift of wave on the y-axis

Thus, can pattern out that A=1, B=5, C=0 and D=0 in the given equation. The SI unit of frequency is Hertz (Hz) or 1/second. Hence, the frequency of the function is 5 Hz.

Would it be negative fourty (-40) as the difference between 20 and -10 is 30 so -10 minus 30 is -40 ?

**Answer:**

B. 60-60-60

**Step-by-step explanation:**

The interior angles of a triangle must add up to 180 degrees. The only set of numbers adding up to 180 is choice B.

**Answer:**

bascially i think when two people have answered ur question after some time an icon thats a crown will show up---u click on it and thats how ya mark an answer as brainliest

**Step-by-step explanation:**

mooo

**Answer:**

Thus, the ratio is:

a:b = 1:4

**Step-by-step explanation:**

Given the expression

Divide both sides by 2

Divide both sides by b

Thus, the ratio is:

a:b = 1:4