Transcript Lesson 7-4A PowerPoint

Glencoe Geometry Interactive Chalkboard
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Lesson 7-1 Geometric Mean
Lesson 7-2 The Pythagorean Theorem and Its Converse
Lesson 7-3 Special Right Triangles
Lesson 7-4 Trigonometry
Lesson 7-5 Angles of Elevation and Depression
Lesson 7-6 The Law of Sines
Lesson 7-7 The Law of Cosines
Example 1 Find Sine, Cosine, and Tangent Ratios
Example 2 Evaluate Expressions
Example 3 Use Trigonometric Ratios to Find a Length
Example 4 Use Trigonometric Ratios to Find an Angle
Measure
Find sin L, cos L, tan L, sin N, cos N, and tan N.
Express each ratio as a fraction and as a decimal.
Answer:
Find sin A, cos A, tan A, sin B, cos B, and tan B.
Express each ratio as a fraction and as a decimal.
Answer:
Use a calculator to find tan
thousandth.
KEYSTROKES: TAN
Answer:
56
to the nearest ten
ENTER
1.482560969
Use a calculator to find tan
thousandth.
KEYSTROKES: COS
Answer:
90
to the nearest ten
ENTER
0
a. Use a calculator to find sin 48° to the nearest ten
thousandth.
Answer:
b. Use a calculator to find cos 85° to the nearest ten
thousandth.
Answer:
Click the mouse button or press the
Space Bar to display the answers.
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