Question

Find the length of side bc ab=6.3 And there is a angle of 71 Use CAH

Answer 1

Answer:

for the full mark you needs to be 19.4

Step-by-step explanation:

almost you got the full mark.

Answer 2

Explanation:

The diagram for this problem is shown below. As you can see, we have a reference angle:

$\theta=71^{\circ}$

And an adjacent side that measures:

$ab=6,3$

Therefore, by CAH we can find side bc:

$cos(\theta)=\frac{Adjacent \ side}{Hypotenuse}=\frac{ab}{bc} \\ \\ bc=\frac{ab}{cos(\theta)} \\ \\ bc=\frac{6.3}{cos(71^{\circ})} \\ \\ bc=\frac{6.3}{0.33} \\ \\ \boxed{bc=19.35}$