Trigonometric Functions and Angles

The video tutorial explains how to find angles in right triangles using trigonometric functions. It starts with triangle K, where the cosine function is used to determine angle K. The process involves identifying the adjacent and hypotenuse sides, then using the inverse cosine function to calculate the angle. The tutorial then moves to triangle R, demonstrating the use of the tangent function to find angle R by identifying the opposite and adjacent sides. Finally, it discusses complementary angles, showing how to calculate the third angle in a right triangle when two angles are known.

In triangle K, which trigonometric function is used to find angle K?

• Tangent

• Sine

• Secant

• Cosine

What is the ratio used in the cosine function for angle K?

• Hypotenuse over Opposite

• Opposite over Hypotenuse

• Adjacent over Opposite

• Adjacent over Hypotenuse

What is the rounded measure of angle K?

• 46 degrees

• 44 degrees

• 42 degrees

• 40 degrees

In triangle R, which sides are known from angle R?

• Opposite and Hypotenuse

• Adjacent and Hypotenuse

• Opposite and Adjacent

• Hypotenuse and Adjacent

Which trigonometric function is used to find angle R?

• Cotangent

• Tangent

• Cosine

• Sine

What is the rounded measure of angle R?

• 74 degrees

• 70 degrees

• 72 degrees

• 68 degrees

If angle R is 70 degrees, what is the measure of angle S?

• 10 degrees

• 20 degrees

• 30 degrees

• 40 degrees