Answer/Step-by-step explanation
(Credit to someone on YT, not me)
Divide the monthly cost by the number of minutes:
$42 / 1594 = 0.026
Rounding to the tenths would be the first place to the right of the decimal which would be 0.00
Cents are usually rounded to the hundredths place, which would be $0.03 per minute.
Cofunctions in trigonometry are function pairs like sine and cosine
Examples:
sin(π/2 - x) = cos(x), cos(π/2 - x) = sin(x), tan(π/2 - x) = cot(x), and cot(π/2 - x) = tan(x)
Purpose:
The cofunction identities show the relationship between sine, cosine, tangent, cotangent, secant, and cosecant. The value of an angle's trig function equals the value of the angle's complement's cofunction