obj: swbat apply trig functions (8.3) hw (day 42): worksheet- odds storybook: “right triangles”...
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Trigonometry cont’d (G.8)
OBJ: SWBAT APPLY TRIG FUNCTIONS (8.3)
HW (DAY 42): WORKSHEET- ODDS
STORYBOOK: “RIGHT TRIANGLES”PEARSONSUCCESS.NET (DUE FRIDAY)
WU: WKS (1, 6, 23, 24, 26, 32, 34, 36) *HW/HW LOG/STORYBOOK AS
REFERENCE
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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 __________
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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?
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Example:
To find the acute angles in right triangles you have to use the inverse trigonometric functions.
This is an example of a Pythagorean Triple. Can you give at least two more examples of a Pythagorean Triple?
5 4
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Example
Find the measure of each angle to the nearest tenth of a degree:
0035.2)tan( A 798.0)cos( B
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Find the Missing Angle or Side
1016
x
x
16
12
17x
9.7 x24
32
1.
4.3.
2.
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Remember:
Use trig ratios to find missing side lengths of right triangles
Use inverse trig functions to find angle measures
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