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Review the concepts of Sine, Cosine and Tangent.

Practice solving problems with more than one right angle triangle.

There are no AI's for this concept.

Videos:

Khan Academy: Introduction to Trigonometry

http://www.khanacademy.org/video/basic-trigonometry?playlist=Trigonometry

Khan Academy: Basic Trigonometry II: A Few More Examples

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Laws of Sine

We use the Sine Law to solve for both angles and sides in oblique triangles, given the following situations:

Two sides and the angle opposite a known side.

Two angles and any side.

Draw a diagram that represents a problem that involves using the sine law.

Explain the steps in a given proof of the sine law.

Use the sine law to determine unknown side lengths or angle measures in an acute triangle.

U3L1

Page 131

Questions #1, 2a, 2c, and 4

U3L2

Pages 139 – 141

Questions #3a, 3b, 3d, 3e, 4, 5, 6a, 6c, 8, 9, 11 and 16

Videos:

Khan Academy: Proof: Law of Sines: A Simple Proof of the Law of Sine

http://www.khanacademy.org/video/proof--law-of-sines?playlist=Trigonometry

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Cosine Law

We use the Cosine Law to solve sides and angles when we are given the following:

Two sides and a contained angle.

All three sides.

Draw a diagram that represents a problem that involves using the cosine law.

Explain the steps in a given proof of the cosine law.

Use the cosine law to determine unknown side lengths or angle measures in an acute triangle.

Pages 151 - 152

Questions #4, 5, 6a, 6c, 8, 11, and 14

Videos:

Khan Academy: Laws of Cosine

http://www.khanacademy.org/video/law-of-cosines?playlist=Trigonometry

Main Concepts in Lesson:

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We use SOH CAH TOA and Pythagorean Theorem when the triangle is a right angled triangle.

We use Laws of Sine and Cosine when the triangle is an Oblique Triangle.

Draw a diagram to represent a problem that involves the cosine and sine law.

Solve a contextual problem that requires the use of the sine or cosine law.

Solve a contextual problem that involves more than one triangle.

Pages 161 - 163

Questions #3, 4, 6, 11, 13, 14,

Videos: