Trigonometry and Calculator Functions

The video tutorial explains how to find the measure of an angle in a right triangle using trigonometry. It begins by identifying the sides of the triangle relative to the angle of interest, then applies the cosine function to calculate the angle. The tutorial includes step-by-step instructions on using a calculator to find the angle in degrees, ensuring the calculator is in the correct mode. The process involves taking the inverse cosine of the ratio of the adjacent side to the hypotenuse, resulting in an angle of approximately 27.27 degrees.

What is the primary goal of the problem discussed in the video?

• To find the length of the hypotenuse

• To find the measure of an angle in a right triangle

• To calculate the area of the triangle

• To determine the perimeter of the triangle

Which side of the triangle is opposite the right angle?

• Opposite side

• Base

• Adjacent side

• Hypotenuse

What is the length of the hypotenuse in the given triangle?

• 10 units

• 7 units

• 9 units

• 8 units

Which trigonometric function is used to find the angle theta?

• Secant

• Sine

• Cosine

• Tangent

What is the ratio used in the cosine function for this problem?

• Opposite side to hypotenuse

• Hypotenuse to adjacent side

• Opposite side to adjacent side

• Adjacent side to hypotenuse

What mathematical operation is used to solve for theta?

• Inverse secant

• Inverse sine

• Inverse tangent

• Inverse cosine

What is the first step to ensure the calculator is ready for the calculation?

• Check if it is in scientific mode

• Check if it is in standard mode

• Check if it is in degree mode

• Check if it is in radian mode

What is the approximate value of angle theta in degrees?

• 27.27 degrees

• 28.28 degrees

• 29.29 degrees

• 26.26 degrees

What should you do if the calculator is not in degree mode?

• Switch to scientific mode

• Switch to radian mode

• Use the arrows to select radian mode and press enter

• Use the arrows to select degree mode and press enter

Why do we round the result of theta to the nearest hundredth?

• To simplify the calculation

• To match the precision required

• To make it easier to read

• To avoid errors in measurement