If and then Please help
Absurd answers will not be tolerated

Step-by-step explanation:

We are given that:

And we want to determine the value of:

First, since cos(A) is positive and tan(A) is negative, this means that ∠A must be in QIV.

In QIV, cosine is positive, sine is negative, and tangent is also negative.

The given ratio tells us that the adjacent side to ∠A is 2, and the hypotenuse is 5.

Then by the Pythagorean Theorem, the opposite side will be given by:

Solve for the opposide side:

So, with respect to ∠A, the adjacent side is 2, the opposite side is √(21), and the hypotenuse is 5.

Using the double-angle identity, we can rewrite our original expression as:

Using the above information, substitute in values. Remember that cosine is positive and that sine is negative:

Simplify. Therefore:

it’s supposed to be -4+45=41

step-by-step explanation: