Question

Evaluate sin 60° without using a calculator by using ratios in a reference triangle.

Answer 1

Answer: sqrt(3)/2.

Answer 2

But how do you get that answer?

Answer 3

Just memorize it. This will occur very often. Sin 30=1/2, Sin 60=sqrt(3)/2, Cos 30=sqrt(3)/2, Cos 60=1/2.

Answer 4

So when I type my answer and explain why I just reference the unit circle?

Answer 5

You'll learn the reference angle later. For now, just memorize the basic trigonometric values like this one.

Answer 6

okay thank you(:

Answer 7

No problem.