How to determine the missing value of a triangle using sine

The video tutorial explains how to solve for the value of Y in a triangle using trigonometric functions. It begins by identifying the sides of a triangle: hypotenuse, adjacent, and opposite. The tutorial then covers the basic trigonometric functions: sine, cosine, and tangent, and how they relate to these sides. The main focus is on using the sine function to find Y, given an angle of 60 degrees. The instructor demonstrates the calculation process, emphasizing the importance of setting the calculator to degree mode. The final result is calculated and rounded appropriately.

What is the side opposite to the right angle in a right triangle called?

• Adjacent

• Base

• Hypotenuse

• Opposite

Which trigonometric function relates the opposite side to the hypotenuse?

• Cosine

• Tangent

• Secant

• Sine

If the angle is 60 degrees, what is the sine of the angle?

• 0.5

• 0.866

• 1

• 0.707

What should you ensure about your calculator before calculating the sine of 60 degrees?

• It is in radian mode

• It is in degree mode

• It is in scientific mode

• It is in basic mode

What is the calculated value of Y when using the sine of 60 degrees and a hypotenuse of 18?

• 15.589

• 9.0

• 12.0

• 18.0