Solve for the remaining angles and side of the triangle described below. Round to the nearest thousandth:C=70°𝐶=70°, a=5𝑎=5, b=3
Question
Solve for the remaining angles and side of the triangle described below.
- Given:
- C = 70°
- a = 5
- b = 3
Round to the nearest thousandth.
Solution
To solve for the remaining angles and side of the triangle, we can use the Law of Sines and the fact that the sum of the angles in a triangle is 180°.
Step 1: Solve for angle A using the Law of Sines. The Law of Sines states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all three sides of the triangle. So, we have:
sin(A)/a = sin(C)/b
Substituting the given values, we get:
sin(A)/5 = sin(70°)/3
Solving for sin(A), we get:
sin(A) = 5 * sin(70°) / 3
Calculating the above expression, we get:
sin(A) ≈ 1.128
However, the value of sin(A) cannot be greater than 1, so there seems to be a mistake. The problem lies in the fact that the given sides a and b with the given angle C do not satisfy the sine rule. The side b is too short to form a triangle with the given angle C and side a. Therefore, the triangle as described cannot exist.
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