3. Section 9.8 Trigonometric Ratios

4. Trigonometric Ratio A ratio of the lengths of two sides of a right triangle.

5. How do I remember this? SOHCAHTOA

6. Find sin A Find cos A Find tan A SOHCAHTOA

7. Find sin B Find cos B Find tan B SOHCAHTOA 63 84 105

8. Find the value on a calculator to the nearest ten thousandth. sin 19° cos 51° tan 24° a.sin 63° b.cos 14° c.tan 41° Answer: 0.8910 Answer: 0.9703 Answer: 0.8693

9. Find the missing measure. Round to the nearest tenth. SOHCAHTOA

10. Find the missing measure. Round to the nearest tenth. SOHCAHTOA

11. Architecture A tourist visiting the Petronas Towers in Kuala Lumpur, Malaysia, stands 261 feet away from their base. She looks at the top at an angle of 80° with the ground. How tall are the Towers? SOHCAHTOA

12. Architecture Jenna stands 142 feet away from the base of a building. She looks at the top at an angle of 62° with the ground. How tall is the building? SOHCAHTOA

13. Homework Practice 9.8