Use the triangle given to find the following trig ratios. 1. sin(θ) = 2. cos(θ) = 3. tan(θ) =

 Test next Thursday  Online HW 10-3 is due Sunday night

 First we need to be in _____________ mode. (Always check before using Trig)  Go to the scratchpad  Hit the doc ▼ button  Click 7: Settings and Status  Click 2: Document Settings  Find where it says “Angle:” o Choose Degree from the drop down menu  Click “Make Default”  Select OK DEGREES

 Second we need to know our ________________(θ). Find the trig button on your calculator (under ctrl)  Select the trig function you wish to use  Input the angle measure into the parentheses  Hit enter and round your answer to the nearest hundredth Reference Angle

***Round to the nearest hundredth

1. Mark the _______________ angle (θ)…usually the one given but never the right angle! 2. Label the two given ___________ in relation to θ (opp, adj, or hyp). 3. Decide which ________________ you can use from SOHCAHTOA. 4. Write the equation, using a ______________ for the missing side.  Set up a __________________ and solve for the variable (using cross multiplication) reference sides Trig function variable proportion

Sin(34) = x/13 13Sin(34) = x X

1.Mark the reference angle: θ = 75 2.Label the given sides in relation to θ: adj. and hyp. 3.Decide which trig function to use: Cosine 4.Write the equation using x for the missing side 5.Set up a proportion and cross multiply Cos(75) = 33/x xCos(75) = 33 X = 33/Cos(75) X = 127.5

 Pg. 438 #4-9

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