Question

Use the Special Right Triangle to evaluate sin 45°, cos 45° and tan 45°. Your answers should be exact (not a decimal).
A. sin 45 = √2/2, cos 45 = √2/2, tan 45 = 1
B. sin 45 = 1, cos 45 = 1, tan 45 = √2/2
C. sin 45 = 1/2, cos 45 = √3/2, tan 45 = √3
D. sin 45 = 0, cos 45 = 1, tan 45 = 0

Answer 1

A

Answer 2

When I have a square like this, the diagonal divides the angle in 90 degree angles in 2 giving you 45 degree angles. Use the pythagorean theorem to find the length of the diagonal.
Then find the trig values you need

Answer 3

so wouldnt it be A?

Answer 4

Yes, A is correct