Answer:
Options A and D.
Step-by-step explanation:
It is given in the question
Side AC = 6.9 cm
side BC = 9.8 cm
side AB = 12 cm
Let ∠BAC = x
We can find this angle x by applying sine and cosine rule in the given right angle triangle ABC
sinx = [tex]\frac{\text{opposite side}}{\text{Hypotenuse}}=\frac{BC}{AB}[/tex]
= [tex]\frac{9.8}{12}[/tex]
[tex]x = sin^{-1}[\frac{9.8}{12}][/tex]
Now we apply cosine rule
cosx = [tex]\frac{\text{Adjacent side}}{\text{Hypotenuse}}[/tex]
= [tex]\frac{6.9}{12}[/tex]
x = [tex]cos^{-1}(\frac{6.9}{12} )[/tex]
Therefore, options A and D are the correct options.
