What is the measure of AB if BC = 8 m and mA is 42°? Round to the nearest tenth of a meter.

5.4 m

5.9 m

8.9 m

9.2 m

Question

What is the measure of AB if BC = 8 m and mA is 42°? Round to the nearest tenth of a meter.

       5.4 m

       5.9 m

       8.9 m

       9.2 m

anonymous · Answer

attachment

anonymous · Answer

You have a right triangle so the trig functions apply

anonymous · Answer

If you know the angle A = 42 and that angle B = 90 you can find angle C knowing that all the angles in the triangle add up to 180 and from there you can choose any of the angles and use the trig functions to solve for the missing side

anonymous · Answer

SOH
$$Sin(\theta) = Opposite/Hypotenus$$
CAH$$Cos(\theta) = Adjacent/Hypotenuse$$
TOA$$Tan(\theta) = Opposite/Adjacent$$

anonymous · Answer

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