How do you solve for the unknown lengths and angle measures of triangle ABC where angle C = 90 degrees, c = 21 and angle B = 49?
1 Answer
Jul 6, 2015
Solve triangle knowing C = 90, B = 49, and c 21
Explanation:
Find A, a and b
A = 90 - B = 90 - 49 = 41 deg
a = c.sin A = 21.sin 41 = 21(0.66) = 13.78
b = c.cos 41 = 21(0.75) = 15.85
Check:
441 = 189.89 +251.52 = 441.1 OK
