Variable varies or changes
constatant term doesn't change
examples
variables can change so example
x>10
x can be 11 or 33 or anythign bigger than 10
constants are no fun
they don't change an are boring, like
3 or 8, it just stays that way
Sin (x + y) = sin x cos y + cos x sin y
<span>sin 255 </span>
<span>= sin (210 + 45) </span>
<span>= sin 210 cos 45 + cos 210 sin 45 </span>
<span>= (-1/2)(√(2)/2) + (-√(3)/2)(√(2)/2) </span>
<span>= -√(2)/4 + (-√(6)/4) </span>
<span>= -√(2)/4 - √(6)/4 </span>
<span>= (-√(2) - √(6)) / 4</span>
Not a hundred percent sure if I got it right but 92* x / 273 * x - 2
10 15 -5
— - — = —
15 15 15
Hope it’s right!!:)