Find the missing side. Round to the nearest tenth.

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Presentation transcript:

Find the missing side. Round to the nearest tenth. x Awesome!

Find the missing side. Round to the nearest tenth. 20 ft x Great Work!

A person is 200 yards from a river A person is 200 yards from a river. Rather than walk directly to the river, the person walks along a straight path to the river’s edge at a 60° angle. How far must the person walk to reach the river’s edge? cos 60° x (cos 60°) = 200 200 60° x x X = 400 yards WOW !!

x 116 m Amazing Work!

Ex: 5 A surveyor is standing 50 feet from the base of a large tree. The surveyor measures the angle of elevation to the top of the tree as 71.5°. How tall is the tree? tan 71.5° ? tan 71.5° 71.5° y = 50 (tan 71.5°) 50 y = 50 (2.98868)

When we are trying to find a side we use sin, cos, or tan. When we are trying to find an angle we use sin-1, cos-1, or tan-1.

Ex. 3: Find . Round to three decimal places. 200 Use the inverse button!!! 400 Make sure you are in degree mode (not radian).