Pre Calc unit 3 How to use sine to find the missing side of a triangle

The video tutorial explains how to find the length of X using trigonometry. It begins by setting up a trigonometric equation with a given angle of 30 degrees and an opposite side of 5. The tutorial then demonstrates solving the equation by isolating X and using a calculator to find the value. It also provides guidance on ensuring the calculator is in the correct mode for degree calculations. The final result is calculated to be 10, and the tutorial concludes by confirming this result.

What is the trigonometric function used to relate the opposite side and hypotenuse in this problem?

• Secant

• Sine

• Tangent

• Cosine

What is the value of the angle Theta used in the trigonometric equation?

• 60 degrees

• 45 degrees

• 30 degrees

• 90 degrees

What operation is performed to remove X from the denominator in the equation?

• Multiplication

• Subtraction

• Addition

• Division

What is the final expression for X after solving the equation?

• X = 5 + sine(30 degrees)

• X = sine(30 degrees) / 5

• X = 5 / sine(30 degrees)

• X = 5 * sine(30 degrees)

Which mode should the calculator be set to for this calculation?

• Degree

• Radian

• Fraction

• Scientific