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Thursday, October 24 thPowerPoint Presentation

Thursday, October 24 th

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Finding an angle.(Figuring out which ratio to use and an inverse trig button.)

)

20 / 40

Tan-1

40 m

Ex: 1 Figure out which ratio to use. Find x. Round to the nearest tenth.x

Shrink yourself down and stand where the angle is.

Now, figure out which trig ratio you have and set up the problem.

15 m

)

15 / 50

Sin-1

Ex: 2 Figure out which ratio to use. Find x. Round to the nearest tenth.x

Shrink yourself down and stand where the angle is.

Now, figure out which trig ratio you have and set up the problem.

When we are trying to find a side we use sin, cos, or tan.

When we are trying to find an angle we use (INVERSE) sin-1, cos-1,ortan-1.

Part 1 Find each angle measure

- Sin B=.4848 2. Sin A=.5150
3. Cos A=.7431 4. Cos W=.6157

5. Cos A=.5878 6. Tan W=19.0811

7. Cos A=.4226 8. TanW=.5317

Group Work

Complete 1-5

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