Question

Triangle A B C is shown. Angle A B C is a right angle. Angle B C A is 22 degrees and angle C A B is 68 degrees.

For ΔABC, which one is equivalent to sin(A)?

cos(B)
sin(B)
cos(C)
tan(C)

Answer 1

The answer is C on Edge

Explanation:

Edge 2020

Answer 2

cos(C)

Explanation:

As you can see in the picture I attached, the angles are in capital letters and the lowercase letters are the sides of the triangle. This is a basic ABC set up for a triangle.

Sine is equal to the opposite side of the angle/the hypotenuse (the long diagonal side).

Cosine is equal to the adjacent side of the angle (the one attached to it)/the hypotenuse (the long diagonal side).

Tangent is equal to the opposite side of the angle/the adjacent side of the angle.

In this case, sin(A) would equal (a/b) and cos(C) would also equal (a/b), so they're equal.