Question

Find the value of the function for θ.

sin(45°) = ?
A) 1/2
B) √2/2
C) √3/2

Answer 1

B) radical2/2

Explanation:

To find the answer, you can A., either type this in a calculator, or B., use the unit circle.

When we observe the unit circle, we can see that the 45* angle is in Quadrant 1, and that the matching radian is pi/4, and the corresponding coordinates are (radical2/2, radical2/2).

So, sin(45*) is B) radical2/2.

Note that sin(θ) means the y-value of the angle's coordinates, cos(θ) normally means the x-value of the angle's coordinates..

Answer 2

The correct answer is B