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Glencoe Geometry Interactive Chalkboard Copyright © by The McGraw-Hill Companies, Inc. Developed by FSCreations, Inc., Cincinnati, Ohio 45202 Send all inquiries to: GLENCOE DIVISION Glencoe/McGraw-Hill 8787 Orion Place Columbus, Ohio 43240 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. End of Custom Shows WARNING! Do Not Remove This slide is intentionally blank and is set to auto-advance to end custom shows and return to the main presentation.