The video tutorial introduces the concept of inverse functions, explaining their familiarity through trigonometry and solving equations. It delves into the relationship between functions and their inverses, providing examples and graphical representations. The tutorial also explores parabolas and their inverses, emphasizing the importance of understanding these mathematical concepts.

What is the main idea behind inverse functions as introduced in the video?

• They are only used in advanced mathematics.

• They are both new and familiar, as they undo the original function.

• They are functions that have no relation to original functions.

• They are completely new concepts.

In the context of a triangle, which trigonometric function is used to find the unknown side when given an angle and one side?

• Cosine

• Secant

• Sine

• Tangent

What is the purpose of using the inverse sine function on a calculator?

• To calculate the area of a triangle

• To find the measure of an angle

• To determine the hypotenuse

• To find the length of a side

How do you find the inverse of a function algebraically?

• By adding a constant to the function

• By swapping the inputs and outputs

• By multiplying the function by itself

• By dividing the function by a constant

What is the inverse of the function y = 3x + 4?

• y = (x - 4) / 3

• x = 3y + 4

• y = 3x - 4

• x = y / 3 + 4

What does the gradient of a line tell you about its graph?

• The steepness of the line

• The y-intercept

• The x-intercept

• The length of the line

What is the visual relationship between a function and its inverse on a graph?

• They are reflections of each other.

• They are perpendicular lines.

• They are identical.

• They are parallel lines.

What happens when you swap x and y in the equation of a parabola?

• You get a new parabola.

• You get a linear function.

• You find the inverse function.

• You eliminate the parabola.

What is the significance of the line y = x in the context of functions and their inverses?

• It is the x-axis.

• It is the line of reflection.

• It is the y-axis.

• It is the axis of symmetry.

What is the inverse of the function y = x^2 + 1?

• x = y^2 - 1

• x = y^2 - 1

• x = y^2 + 1

• x = (y - 1)^2