4.2 sss and sas.notebook - mrs. villano's classes...4.2 sss and sas.notebook 4 october 15, 2018...

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Unit Circle

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Sine and Cosine

Domain

[­ 1, 1]

Period(how long does it take until it starts 

to repeat)

set of all real numbers(­ ∞, ∞)

Range

2π

Sin  :  Domain_____________  Range__________________

Cos  :  Domain_____________  Range__________________

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along the same lines as coterminal

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Evaluate without a calculator

Evaluate with a calculator

***make sure to use 1/trig function  or can use x ­ 1  not sin­ 1

Must be in radian mode!

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• coterminal to 1650 (one pos. one neg.)

• convert to radians 1320

• convert to degrees 3π 8

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Definitions of Trigonometric Functions of Any Angle

Let θ be an angle in standard position with (x, y) a point on the terminal side of θ and 

(x,y)

rθ

sinθ=

cosθ=

tanθ= cotθ=

secθ=

cscθ=yr

xr

xy

yr

xr

xy

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Model Homework Problems

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Model Homework Problems

Where is this on the unit circle?

same as 60

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Model Homework Problems

same as 315

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Model Homework Problems

1.394

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https://create.kahoot.it/details/49ad3232­f188­41da­8dd2­b29b8640572c

https://create.kahoot.it/details/duplicate­of­unit­circle/31cec6a5­84fd­4817­a110­c0a25cc8d4c2