Homework Quiz:

The angle of elevation from the top of a small building to the top of a nearby taller building is 46o40', while the angle of depression to the bottom is 14o10'. If the shorter building is 28.0 m high, find the height of the taller building.

10.3.12Monday, October 01, 20121:11 PM

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** This is EXACTLY OPPOSITE of the way angles are measured on the coordinate plane **

Solving a problem involving bearing:

Radar stations A and B are on an east-west line, 8.6km apart. Station A detects a plane at C, on a bearing of 53 degrees. Station B simultaneously detects the same plane, on a bearing of 323 degrees. Find the distance from B to C

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plane, on a bearing of 323 degrees. Find the distance from B to C

Solving a problem involving Bearing:

The bearing form A to C is N 64o W. The bearing from A to B is S 82o W. The bearing from B to C is N 26o E. A plane flying at 350 mph takes 1.8 h to go from A to B. Find the distance from B to C

Practice: p. 542 #48

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A to B. Find the distance from B to C

Practice: p. 543 #52

Solving a problem involving angles of elevation:

Marla needs to find the height of a building. From a given point on the ground, she finds that the angle of elevation to the top of the building is 74.2o. She then walks back 35 ft. From the second point, the angle of elevation to the top of the building is 51.8o. Find the height of the building.

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Practice: p. 543 #56

pp. 542-544 #47-59 odd Homework: Read pp. 534-38

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