Math Problem Statement

Solve for b using the Law of Sines given a triangle with sides 27, angles 102° and 28°.

Solution

We can solve for bb using the Law of Sines, which is given by the formula:

asinA=bsinB=csinC\frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C}

In this triangle:

  • a=27a = 27 (side opposite the angle A=28A = 28^\circ)
  • A=28A = 28^\circ
  • B=102B = 102^\circ (angle opposite the side bb, which we need to solve for)
  • C=50C = 50^\circ (since the sum of the angles in a triangle is 180°: C=18010228C = 180^\circ - 102^\circ - 28^\circ)

To solve for bb:

  1. Use the Law of Sines to set up the equation: 27sin28=bsin102\frac{27}{\sin 28^\circ} = \frac{b}{\sin 102^\circ}

  2. Solve for bb: b=27sin102sin28b = \frac{27 \cdot \sin 102^\circ}{\sin 28^\circ}

Let me calculate this for you.The length of side bb is approximately 56.356.3 units when rounded to the nearest tenth.

Would you like more details on the steps, or do you have any other questions?

Here are five related questions to deepen your understanding:

  1. How would you solve for the third side of the triangle using the Law of Cosines?
  2. What happens if you have a triangle where you don’t know any angles?
  3. How does the Law of Sines differ from the Law of Cosines?
  4. Can the Law of Sines be applied to non-obtuse triangles?
  5. How would you approach solving for side bb if the triangle were not solvable using the Law of Sines?

Tip: Always ensure your calculator is set to the correct mode (degrees or radians) when solving trigonometric problems.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Law of Sines
Angle Sum Property

Formulas

Law of Sines: a/sin(A) = b/sin(B) = c/sin(C)

Theorems

Law of Sines

Suitable Grade Level

Grades 9-12