Current location - Training Enrollment Network - Mathematics courses - Triangle problem-solving in mathematics in the next semester of senior three: b = 40°C = 20°C = 45 degrees, and the problem-solving process is explained in detail.
Triangle problem-solving in mathematics in the next semester of senior three: b = 40°C = 20°C = 45 degrees, and the problem-solving process is explained in detail.
According to cosine theorem, cos c = (a 2+b 2-c 2)/2ab.
Solution: A does not exist.
According to sine theorem sin c/c=sin b/b
Solution: sin b= 2 under the root sign, so the angle b does not exist.
So this question is wrong, or the questioner is sb.