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Lecture

# Inverse Trig Functions: Arctan

Home > Mathematics > Trigonometry > Inverse Trig Functions: Arctan Lecture Details:

Understanding the arctan or inverse tangent function.

Lectures:
• ### Basic Trigonometry Part 1

00:08:44Salman Khan

An introduction to trigonometric functions: sine, cosine, and tangent.

• ### Basic Trigonometry Part 2

00:05:54Salman Khan

Another example of figuring out the sine, cosine, and tangent of an angle in a right triangle.

00:09:55Salman Khan

• ### Using Trig Functions Part 1

00:10:02Salman Khan

Using Trigonometric functions to solve the sides of a right triangle.

• ### Using Trig Functions Part 2

00:08:37Salman Khan

A couple of more examples of using Trig functions to solve the sides of a triangle.

• ### The Unit Circle Definition of Trigonometric Functions Part 1

00:09:07Salman Khan

Using the unit circle to extend the SOH CAH TOA definition of the basic trigonometric functions.

• ### The Unit Circle Definition of Trigonometric Functions Part 2

00:10:11Salman Khan

Using the unit circle to define the sine, cosine, and tangent functions.

• ### Graph of the Sine Function

00:07:44Salman Khan

Using the unit circle definition of the sine function to make a graph of it.

• ### Graph of the Trig Function

00:10:16Salman Khan

Exploring the graphs of trig functions.

• ### Graphing Trig Functions

00:09:53Salman Khan

Analyzing the amplitude and periods of the sine and cosine functions.

• ### Trig Graphs

00:05:12Salman Khan

Determining the equations of trig functions by inspecting their graphs.

• ### Determining the Equation of a Trigonometric Function

00:09:51Salman Khan

Determining the amplitude and period of sine and cosine functions.

• ### Trigonometric Identities Part 1

00:09:10Salman Khan

Introduction to trigonometric identities.

• ### Proof: sin(a+b) = (cos a)(sin b) + (sin a)(cos b)

00:09:48Salman Khan

Proof of the trig identity sin(a+b) = (cos a)(sin b) + (sin a)(cos b).

• ### Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)

00:09:22Salman Khan

Proof of the trig identity: cos(a+b) = (cos a)(cos b)-(sin a)(sin b).

• ### Trigonometric Identities Part 2

00:09:56Salman Khan

More playing around with trig identities.

• ### Trigonometric Identities Part 3

00:08:35Salman Khan

Continuation of the playing around with trig identities.

• ### Trigonometry Word Problems Part 1

00:09:56Salman Khan

The first part of a problem when the captain of a ship goes off track.

• ### Trigonometry Word Problems Part 2

00:02:51Salman Khan

The second part of the problem of the off-track ship captain.

• ### Law of Cosines

00:09:26Salman Khan

Introduction to the law of cosines to solve for a side of a triangle when 2 sides and an angle are known.

00:08:00Salman Khan

Trigonometry problem involving two ships colliding.

• ### Proof: Law of Sines

00:06:32Salman Khan

A simple proof of the Law of Sines.

• ### Ferris Wheel Trig Problem Part 1

00:07:20Salman Khan

Trigonometry problems dealing with the height of two people on a ferris wheel.

• ### Ferris Wheel Trig Problem Part 2

00:09:07Salman Khan

Part 2 of the ferris wheel problems. Graph of h(t)=9-8cos(18t).

• ### Fun Trig Problem

00:10:01Salman Khan

A trig problem involving the quadratic equation.

• ### Inverse Trig Functions: Arcsin

00:10:36Salman Khan

Introduction to the inverse trig function arcsin.

• ### Inverse Trig Functions: Arctan

00:10:06Salman Khan

Understanding the arctan or inverse tangent function.

• ### Inverse Trig Functions: Arccos

00:13:38Salman Khan

Understanding the inverse cosine or arccos function.

• ### Trigonometry Identity Review/Fun

00:11:07Salman Khan

Revisiting the proofs of some trigonometry identities.