# Quiz 7 - L,cg-t-co(z*1 l c^"" Fi:rl,tti 15,rA...

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All work must be shown to receive credit. ", Precalculus March 5,2010 L. Brubaker / 2--o 92.* cA. t+- -r>A zB l-U-e-l 6o'-z -,{ 2. (4 points) Given o, and B are obtuse angles with sin o = -andcosf =^, ,r: O"O g r) fr a) cos(a - p) b) tan(a - B) I ., "i f Nsll ' t',':?)lT;T ,:::rT'I'ff:-;""' ""[#)'"'(#).'"'(#)"'(#) ; lt n 9',< ( ^ ! B) 7 S i .,a C.a9A, ! btd 4:rp, d2 g z.i / trti, t A_;l '"'(.'+ ^ -+): 5,-n ('+ ) , ,,{4) -r I c 23/ Cot (g- J l'4\ 2 Czt J CatB F f i.6 ti,"/? ,af - a'i * ._L 1- r - stt -2r> ao r-'r-'. , 8t -'3 tY' ,'-n., t z1t: trf /tq\ x: Jui_2,/- _,* ry- z3{z- :zE /t,{\ x;,p;_z?- u 'r -1:*- -qs"{ + @\ *i = [T., y. Jv'{1" ^ t* t:#)(g) r: elt 3. (3 points) Rewrite Ssina x in terms of an expression c6ntainirig only cosines to the power 1: t(e.^o,(.ei-,'x) =";-(r;)-# lt4rT-1it^8r) gr,-cos(zt\ t-c-cs(zx) i t+---- :"- auech'on

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Unformatted text preview: L:__ --- -}'** ) ,cg ,-t_( -co'(z*1 l(, c^"(."))] Fi:rl{.,tti +15 .,rA Lr ;ri:sl1x)+(.-t" '.lx)1.--,. t(.t*c"- /6s-a 1 L,__. ._!-.,^)l \ -1;-- ,1 Lr.,X_i,':.rrr) tltl-rlr-- ) i (z noiplly3half-angle identity,to find the exact value for sin d and cos I for e =+. = ! 69 o i\n u --L,l '-C"j(zq: C-i y-+ I t+c.t(zr,L =) er&-;':U--.t- z--U ---;* I.€ r l-{+J.r \ -*"' \ ''\ J.t--t-L '.r il \r .-J \C' I +- i'rr -' '4 l--{ i)-t - c-'\lL o\ 2__ (c,s I rt rlr ) = \;)/ c_^cc ( J- y R\ -_ 1: ( x. ! ,B\ , 4a^ (r'!fr) 9,n L ,*. C-g 'J , L- ) L <41 a1, -_ C-.--t {a4 \r e-._, C-^>9 "q C-Dt,b + 1; a e1 9:- ,Q' 5', 1t c,ut,B L q// st-p- {a,-A +*.a*A I ; {",^*ta'^l' t - c,.o { (zn* )-Z-t L,Dt (r*\ "_ {- C--s (z'<) ( + L,cs (oo-) '1, J L-[-i-+ \ | - c--J (ze'\ '-l) Vz-+ t -{ uaf ( u } '**z-.L +t I t- QfQat ( + C-t (zx)...
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Quiz 7 - L,cg-t-co(z*1 l c^"" Fi:rl,tti 15,rA...

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