Question

Which is the cosine ratio of ZA?А19728195B195197281972819519528

Answer 1

Let's begin by listing out the given information:

$\begin{gathered} adjacent,AC=28 \\ hypotenuse,AB=197 \\ opposite,BC=195 \\ cosA=\frac{adjacent}{hypotenuse} \\ cosA=\frac{28}{197}=0.14213 \\ A=\cos ^{-1}0.14213 \\ A=81.82\approx82 \\ A=82^{\circ} \\ \\ \therefore cosA=\frac{28}{197} \end{gathered}$