Question

Find the sine, cosine, and tangent of 45 degrees.

A. Sin 45 degrees = negative square root of 2 divided by 2, cos 45 degrees = negative square root of 2 divided by 2, tan 45 degrees = negative square root of 2
B.Sin 45 degrees = square root of 2 divided by 2, cos 45 degrees = square root of 2 divided by 2, tan 45 degrees = square root of 2
C. Sin 45 degrees = square root of 2 divided by 2, cos 45 degrees = square root of 2 divided by 2, tan 45 degrees = 1
D.Sin 45 degrees = square root of 2 divided by 2, cos 45 degrees = square root of 2 divided by 2, tan 45 degrees = −1

Answer 1

Do you have a unit circle with you?

Answer 2

Find 45 degrees.

Answer 3

I know it D or C

Answer 4

So you are stuck with tan?

Answer 5

YA

Answer 6

Tan is - when in I and III quadrant

Answer 7

right?

Answer 8

You see, when you divide anything with the same value, the answer will always be 1.

Answer 9

Tan's restricted domain are Quadrants II and III.

Answer 10

But where is 45 degrees?