00:01
Write the expression in terms of the given function.
00:04
So given function is cotaging the effect.
00:07
Okay, first we want to find the least common, we want to uniform the denominator, okay? so for the first fraction, i want to multiply the numerator and denominator together by 1 minus cosine of x.
00:35
Okay, i want to multiply the common factor, 1 plus cosine fx to the second fraction, okay? so 1 minus cosine of x.
00:50
Over 1 minus cosine of x squared plus cosine of x plus cosine of x squared divide 1 minus cosine of x squared okay if i know the denominator is the same so if i'm out add the numerator together i have some unexpected result okay i can cancel out cosine of x.
01:35
So 1 plus cosine of x squared, divide 1 minus cosine of x squared.
01:41
So 1 minus cosine of x squared is sine of x squared...