00:07
Okay, section 3 .6, and we are looking at problem number, sorry about this, problem number 77.
00:18
So problem number 77, and here we're asked to find d, s, d, t, and we're given that theta is equal to 3 pi over 2, and s is equal to cosine of theta, and d theta, d theta, d t, is equal to 3 pi over 2, and s is equal to, and d theta, d, and t, is equal to, to five.
00:52
Okay? so let's start with this function s is equal to cosine of theta...