# Cosine

• ### Sine & Cosine of a Sum: Discovery

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Tim Brzezinski

• ### Cosine Identity

Activity

Tim Brzezinski

• ### Similarity & Right Triangle Trigonometry

Book

Tim Brzezinski

• ### Graphing Sine & Cosine Functions (II)

Activity

Tim Brzezinski

• ### Identifying Trig Ratios: Quick Formative Assessment

Activity

Tim Brzezinski

• ### Derivative of Sine & Cosine Functions (Quick Investigation)

Activity

Tim Brzezinski

• ### Unit Circle and Cosine Graph

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Anthony OR 柯志明

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ayoob

• ### True Meaning of Sine, Cosine, Tangent Ratios within Right Triangles

Activity

Tim Brzezinski

• ### Right Triangles: Identifying Sides WRT Acute Angles

Activity

Tim Brzezinski

• ### Trigonometric Ratios (Right Triangle Context)

Activity

Tim Brzezinski

• ### Law of Cosines: Discovery

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Tim Brzezinski

• ### Graphing Sine & Cosine Functions (I)

Activity

Tim Brzezinski

• ### Sine & Cosine Period Action (1)!

Activity

Tim Brzezinski

• ### What "CO" in COsine Means

Activity

Tim Brzezinski

• ### Quiz 1: Trigonometric Functions of Special Angles

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Tim Brzezinski

• ### Right Triangle Generator for Right Triangle Trigonometry

Activity

Tim Brzezinski

• ### Quiz: Graphing Sine & Cosine Functions (Amplitude & Vertical Shift Only)

Activity

Tim Brzezinski

• ### Evaluating Trig Functions Given a Point on the Terminal Ray

Activity

Tim Brzezinski

• ### Finding Exact Trig Ratios: Quiz Question Generator

Activity

Tim Brzezinski

• ### Finding Acute Angles of Right Triangles

Activity

Tim Brzezinski

Activity

J Rothman

• ### Sine & Cosine Function Modeling: Finding Correct Parameters

Activity

Tim Brzezinski

• ### Unit Circle to Sine and Cosine Functions

Activity

Tim Brzezinski