Question

The equation sin (40 degree) equals StartFraction b Over 20 EndFraction can be used to determine the length of line segment AC. Triangle A B C is shown. Angle A C B is a right angle. The length of side A C is b and the length of hypotenuse A B is 20 centimeters. What is the length of ? Round to the nearest tenth. 11.8 cm 12.9 cm 14.9 cm 15.3 cm

Answer 1

Answer:

B. 12.9cm

Step-by-step explanation:

I presume we are asked to find the length of b

$sin\alpha =\frac{opposite}{hypotenuse} \\sin 40^0=\frac{b}{20}\\b=20 X sin 40^0=12.85cm=12.9cm$

Answer 2

Answer:

B

Step-by-step explanation: