The cosine of an angle is the ratio of the opposite side over the hypotenuse.
a. true
b. false

False, The cosine of an angle is the ratio of the opposite side over the hypotenuse.

Let ΔABC is a right angled triangle, ∠C = 90°

Figure is attached.

let ∠B be

Then the trigonometric ratios are the following:

So, clearly

Its

option: d is correct

step-by-step explanation:

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong