Question

Explanation and help completely lost

Answer 1

Hello.

The find the measure of side c, you should use the Law of Sines. This law states, sin A / a = sin B / b = sin C / c. Since you are given two angle measures and the measure of a side, you can substitute these values into sin B / b = sin C / c.

Here are the given values: sin B = 105 degrees, sin C = 15 degrees, side b = 2 cm.

sin (105) / 2 = sin (15) / c (multiply both sides by c)

sin (105) / 2 · c = sin (15)

0.48296... · c = 0.25881... (divide both sides by 0.48296)

c = 0.53588..

The value of side c is about 0.5 centimeters.

Answer 2

Not sure about explanation I just added 105 and 15 and subtracted from 180 to get 70 you can try that.