Trigonometry contd G 8 OBJ SWBAT APPLY TRIG

Trigonometry cont’d (G. 8) OBJ: SWBAT APPLY TRIG FUNCTIONS (8. 3) WU: WKS (1, 6, 23, 24, 26, 32, 34, 36) *HW/HW LOG/STORYBOOK AS REFERENCE HW (DAY 41): WORKSHEET- ODDS STORYBOOK: “RIGHT TRIANGLES” PEARSONSUCCESS. NET (DUE FRIDAY)

Evaluate: cos 41 , first press the “cos” button on the calculator, then type in “ 41” and then press enter. So to the nearest ten-thousandths, cos 41 _____ Evaluate the following, round to the nearest ten- thousandths: ▪ sin 43 _____ ▪ cos 84 _____ ▪ tan 21 _____

Examples: �A 16 -foot ladder is propped against a building. The angle it forms with the ground measures 55. How far up the side of the building does the ladder reach? �A plane is one mile above sea level when it begins to climb at a constant angle of 2 for the next 70 ground miles. How far above sea level is the plane after its climb?

Example: �To find the acute angles in right triangles you have to use the inverse trigonometric functions. 5 4 �This is an example of a Pythagorean Triple. Can you give at least two more examples of a Pythagorean Triple?

Example �Find the measure of each angle to the nearest tenth of a degree:

Find the Missing Angle or Side 2. 1. 3. 4.

Remember: Use trig ratios to find missing side lengths of right triangles Use inverse trig functions to find angle measures