In a right triangle, the acute angles have the relationship sin(2x+4)=cos(46)

The ratio equivalent to the sin of ∠A will be:

sin ∠A = BC / AB

Hence, option 3) is correct.

Step-by-step explanation:

We know that some of the trigonometric ratios such as

In our case

Ф  = ∠A

As we have to determine the ratio equivalent to the sin of ∠A

so

sin Ф = Opposite / Hypotenuse

Here:

Ф  = ∠A

Opposite of ∠A = BC

Hypotenuse = AB

Thus,

substituting Ф  = ∠A, Opposite = BC, Hypotenuse = AB

sin Ф = Opposite / Hypotenuse

sin ∠A = BC / AB

Therefore, the ratio equivalent to the sin of ∠A will be:

sin ∠A = BC / AB

Hence, option 3) is correct.

c

step-by-step explanation:

thus, the first answer choice, y = sec x, is the correct one