Answer:
= 14
Step-by-step explanation:
Given a right angled triangle with hypotenuse length c =18.6 and ∠B = 43°.
We can use the trigonometric forms of a right angled triangle,
That is;
Cos 43 = Adjacent/Hypotenuse
That is;
Cos 43 = BC/AC = a/c
Therefore;
Cos 43 = a/18.6
a = 18.6 × cos 43
= 13.603
= 14
Therefore, BC or a is 14 (to the nearest whole number)
