Math Problem Statement

First solve for the unknown angle using the angle sum formula. Then use the law of sines to find AB. The law of sines states that in any triangle​ ABC, with sides​ a, b, and​ c, the following hold. Check your calculations carefully. StartFraction a Over sine Upper A EndFraction equals StartFraction b Over sine Upper B EndFraction ​, StartFraction a Over sine Upper A EndFraction equals StartFraction c Over sine Upper C EndFraction ​, and StartFraction b Over sine Upper B EndFraction equals StartFraction c Over sine Upper C EndFraction

Solution

To solve this problem systematically, let’s follow these steps:


Step 1: Solve for the unknown angle using the angle sum formula

The angle sum formula for a triangle states:

Sum of angles in a triangle=180\text{Sum of angles in a triangle} = 180^\circ

If two angles of the triangle are known, say AA and BB, the third angle CC can be found as:

C=180ABC = 180^\circ - A - B


Step 2: Apply the Law of Sines

The Law of Sines states:

asin(A)=bsin(B)=csin(C)\frac{a}{\sin(A)} = \frac{b}{\sin(B)} = \frac{c}{\sin(C)}

Here:

  • aa, bb, and cc are the lengths of the sides opposite to the angles AA, BB, and CC, respectively.
  • You will use this formula to find the side ABAB based on the given information.

Rearrange for the unknown side:

To find the length AB=cAB = c, rearrange the Law of Sines:

c=asin(C)sin(A)c = \frac{a \cdot \sin(C)}{\sin(A)}

or equivalently:

c=bsin(C)sin(B)c = \frac{b \cdot \sin(C)}{\sin(B)}


Step 3: Solve and Check

Let me know the numerical values of the given angles and sides, or upload an image if it’s available. With those details, I can compute the solution and verify calculations.

Would you like to proceed with this? If any of the values are unclear, feel free to share them now.


5 Related Questions:

  1. Can you calculate all sides of the triangle using the Law of Sines?
  2. What happens when two sides and one angle are given in a triangle?
  3. How does the Law of Cosines differ from the Law of Sines?
  4. Can the Law of Sines apply to non-obtuse triangles?
  5. Why do we need trigonometric functions to solve triangles?

Tip:

Always ensure the angles are in the correct units (degrees or radians) based on your calculator's settings when solving trigonometric problems.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Triangle Properties
Angle Sum Property
Law of Sines

Formulas

Angle Sum Formula: C = 180° - A - B
Law of Sines: a/sin(A) = b/sin(B) = c/sin(C)
Rearranged Law of Sines: c = (a * sin(C)) / sin(A)

Theorems

Law of Sines
Angle Sum Property of a Triangle

Suitable Grade Level

Grades 10-12