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Sagot :
Answer:
our answer will be in quadrant 1 only.
Step-by-step explanation:
From the
cos−1(1) we have the side adjacent to ∠θ=1 and the side hypotenuse=2 . So this is a 30∘−60∘−90∘ triangle and θ=60∘therefore the opposite to ∠θ=√3.
Note that from the restrictions for the range of inverse circular functions cos−1x is restricted to quadrants 1 and 2 and since the argument is positive 12 our answer will be in quadrant 1 only.
The equation that can be used to find the measure of angle BAC is [tex]A = \tan^{-1}(\frac{12}5)[/tex]
To find the measure of angle BAC, we make use of the following tangent ratio
[tex]\tan(A) = \frac{12}5[/tex]
Next, we take the arc tan of both sides
[tex]\tan^{-1}(\tan(A)) = \tan^{-1}(\frac{12}5)[/tex]
So, we have:
[tex]A = \tan^{-1}(\frac{12}5)[/tex]
Hence, the equation that can be used to find the measure of angle BAC is [tex]A = \tan^{-1}(\frac{12}5)[/tex]
Read more about tangent ratios at:
https://brainly.com/question/14169279
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