Question

Determine if you would use the Pythagorean Theorem, Trigonometry or Inverse Trigonometry to solve the following example.31°000X19TrigonometryPythagorean TheoremInverse Trigonometry.

Answer 1

Given:

Given that a right triangle with one angle and one side.

Required:

To determine which of the option we need to use.

Explanation:

The given triangle is a right triangle and it having only one side and one angle.

Pythagorean Theorem : If in a triangle the square on one of the sides equals the sum of the squares on the remaining two sides of the triangle, then the angle contained by the remaining two sides of the triangle is right.

Therefore, here Pythagorean Theorem s not used.

We have to use the trigonometry formula.

$\begin{gathered} \cos\theta=\frac{adj}{adj} \\ \\ \cos31=\frac{19}{x} \end{gathered}$

Final Answer:

The option Trigonometry is correct.