Question

Which is larger, cosine 77 degrees or sine 77 degrees?

Answer 1

I have a solution with a calculator and without a calculator.

Answer 2

with

Answer 3

I would tell you to use the calculator, but...

Answer 4

Don't even consider a calculator. They are the same at 45º. Cosine is greater than sine for angles between 0º and 45º. Sine is greater then cosine for angles between 45º and 90º.

Answer 5

That's the better solution.

Answer 6

So the sine is greater than the cosine because 45 < 77 < 90, and there's your answer.