Express the following as a function of a single angle.
Cos^2(81°) - sin^2(81°)

= (162°)

Step-by-step explanation:

(81°) - (81°)

we know that;

(x°) - (x°) = (2x°)

(81°) - (81°) = (2 * 81°)

= (162°)

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )

i believe that the slope of the line is -5

step-by-step explanation: