Simplifying Trigonometric Expressions

This trigonometry video tutorial explains how to simplify trigonometric expressions using reciprocal identities and pythagorean identities.
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Trigonometry Formula Sheet: bit.ly/47diggI
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Trigonometry - Basic Introduction: • Trigonometry
Introduction to Angles: • Introduction to Angles
Radians and Degrees: • Radians and Degrees
What Exactly Is a Radian? • Trigonometry - What Ex...
Coterminal Angles: • Coterminal Angles In R...
Decimal Degrees to DMS: • Decimal Degrees to DMS...
Arc Length of a Circle and Sector Area: • Arc Length of a Circle...
Linear Speed and Angular Velocity: • Linear Speed and Angul...
Clock to Angle Problems: • Clock Aptitude Reasoni...
The Unit Circle: • The Unit Circle, Basic...
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Reference Angles: • How To Find The Refere...
The Six Trigonometric Functions: • The Six Trigonometric ...
How To Solve Right Triangles: • Trigonometry - How To ...
Reciprocal Identities: • Reciprocal Identities ...
Quotient Identities: • Quotient Identities - ...
Even and Odd Trigonometric Identities: • Even and Odd Trigonome...
Pythagorean Identities: • Pythagorean Identities...
Trig Functions - Periodic Properties: • How To Evaluate Trigon...
Trigonometry For Beginners: • Trigonometry For Begin...
The Exact Value of Trig Functions: • How To Find The Exact ...
Special Right Triangles - 30 60 90: • Special Right Triangle...
Special Right Triangles - 45 45 90: • Special Right Triangle...
Cofunction Identities: • Cofunction Identities ...
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Angle of Elevation Problems: • Angle of Elevation and...
Evaluating Trig Functions Given a Point: • Evaluating Trigonometr...
Exact Value of 5 Remaining Trig Functions: • How To Find The Exact ...
Evaluate Trig Functions - Reference Angles: • How To Use Reference A...
How To Graph Trig Functions: • Graphing Trigonometric...
How To Graph Sine and Cosine: • How To Graph Trigonome...
Evaluating Inverse Trig Functions: • Evaluating Inverse Tri...
Finding The Missing Side of a Triangle: • How To Calculate The M...
Finding The Missing Angle of a Triangle: • How To Calculate The M...
Two Triangle Trigonometry Problems: • How To Solve Two Trian...
Bearings Vs Direction - Word Problems: • Bearings vs Direction ...
Two Triangle Problems - More Examples: • Trigonometry - How To ...
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Verifying Trig Identities: • Verifying Trigonometri...
Trigonometry Final Exam Review: • Trigonometry Final Exa...

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Final Exams and Video Playlists: www.video-tutor.net/ Trigonometry Formula Sheet: bit.ly/47diggI

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Hello. Thanks for the video. I love your teaching method. MY only question was number 6. I still don't understand how you got the cos/cos fraction. Could you elaborate on this? Thanks.

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Cos/cos = 1 One multiple of anything is anything itself.

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