ࡱ> ~} {bjbj 0Nlxxt< p p pWtYtYtYtYtYtYtuxYt p`| p p pYtAntrrr p Wtr pWtrrVs@ t:J@ps Ctt0ts Nybr:Ny tNy t8 p pr p p p p pYtYtr p p pt p p p pNy p p p p p p p p px : Geometry Name_________________________ Notes Finding an angle using Trigonometry Date_____________ So far we have just used trig to find missing measures of sides. We can also use it to find missing angles when we know two of the sides. You are going to use your calculator a little differently to do this. When we know the sides, but dont use the angle we have to tell our calculator that we want to know an angle measure. The way we do this is by pressing 2nd, then either sin, cos, or tan. Then the calculator tells us the degree measure. Here is how it works: (round to the nearest degree) 1. sin A = 0.4226 A = _______ 2. cos B = 0.6691 B = ________ 3. tan R = 0.2679 R = _______ 4. sin Z = 0.8290 Z = ________ There are steps we need to use when we are looking for the missing angle measure in a problem.  Mark the angle that you are looking for. Label the given sides in relation to the angle that you need to find. Decide which trig function (sin, cos, or tan) you can write with the sides that you have been given. Write out the trig function. Use the 2nd sin, cos, or tan to tell you the missing angle. Here are a few examples. EX 1 Find the missing angle, x Mark the angle that we are looking for, x. Label the given sides in relation to x. (opp, hyp) Decide which trig function goes with Opp, Hyp (sin) Write out the trig function. Use your calculator to tell you the degree measure. EX 2 Find the missing angle, x  Mark the angle that we are looking for, x. Label the given sides in relation to x. (opp, adj) Decide which trig function goes with Opp, Adj (tan) Write out the trig function. Use your calculator to tell you the degree measure. Geometry Name_________________________ WS Finding an Angle using Trig Date_____________ Solve for x in each of these problems. Remember to look at your example sheet to help you. Also, remember SOHCAHTOA. 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F G H I J O R      p q u 6 8 : VWXY`ae%(KM {(h%tttX^t~tH t tt ^t h8>t x>H t ^tnZt.:tn~Zt .j~ t>yt?QFmbt@Yt.j~ tC`tA+GtB?[gtnLtn|.LtLnt^tEm!tD tF=YitHhtG[hwtI!t.Utn.UtU^t^tKtLr tJGtQ, tMc !tOc r tN+tn^tn.^tn~ ~tntRm4tPtS[_tT0tUw?G[t!ct q9tX=CYtjntj :tVYdtW"tYn|t["tZ+IGt"Ft%t$Ft#nFt^=t] =t\!!tahc t`+hGt_Ht)t("Nt'nt&ntc)tbmztd3tf`}|teG3c tg t,9t-t*~ t+^~ tiu V tj=+th=5Ytk+/tlwtmwt3dt2d$$ t/$dt.tpm1tn=1Yto,tq1 ts[trxt5t4%@ttJt1bt0ttv=tu=YEty0nLtwp[txEt}w*t9Dt8Dt74t6t{ tzo!t|!t~ tGhc t=d.t<dt;#}t:4$t:tm:tt+G0t+tthk,/14[^`c>ACFmpruly|lolpqyz  !"$%34>?LMWXabhirs|333333333333333333333333333333333-]ook||N#* 6#2Z(:`Dhh^h`o(.xx^x`o(.xx^x`o(.N#*6#Z(:P=iG+m{5pR5_nln@{@UnknownG* Times New Roman5Symbol3. * ArialCNComic Sans MSA BCambria Math"qhp&p&!24dd,2QHP(?iG2!xx'Name____________________________ Clements High SchoolRobert Couture   Oh+'0 , L X dpx(Name____________________________ Clements High SchoolNormalRobert Couture2Microsoft Office Word@@J@@J@՜.+,D՜.+,T hp|   d (Name____________________________ Title h">Vj~    GradeOrder Audience Category0 Class NameTermLevel Subject Area Status SequenceN/A572700.000000000Internal Only Resource GeometryN/A High School MathematicsFinal1  !"#$%&')*+,-./123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklnopqrstvwxyz{|Root Entry FpJ@Data (1Table0fyWordDocument0NSummaryInformation(mDocumentSummaryInformation8uCompObjy  F'Microsoft Office Word 97-2003 Document MSWordDocWord.Document.89q