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# Quiz 8 - l5,0 LosY'5 c",s's l?c.tt 1-O 2<.o3t I c-t i...

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Precalculus March 12,2010 L. Brubaker FL aq- % *t without using a calculator, .ot[.or- t'+)l urqrvr' wvrlwvo lz )) c€t / -\ 3l :,riu;;;;;;beling the sides: .",[.*ri"f+)-l 5/1 ," se",' irl ^ =_ h.+s,,/t / lt{ vl+5'- 'a/' 7i >."- ={' - #}r= s', Z *L '-, //- t L g'A .cos x - 5 = 0 . List the principal root, all solutions in -r) : o All work must be shown to receive credit. 1. (1 point) Find the exact value of the given expression rn ' cut-/f-J\. zr> '-/'- -t 3 'l Gt (+\. bt ry ,' ;_g T 2. (2 points) Evaluate each exprerrion 6y drawing F.t*n-a u!\t r:n-' 3:-;) t'-7u -/ I - ../_ l..- 5 5t'* bt (s-,^'t ( t4._\\ c*r - * , \-{) ) E" Qtt I l,'' -.'9\ -- 3. (3 poinls)Jmdthqsoiullons in ridiins of 3cos2 x + l4c Lo''"'W' (c' <* I 5 )(g u'o CoJ>t
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Unformatted text preview: l5::,0 LosY ' '5 c",s-' ('s), l' ?c-.tt/- '\ 1-O 2<.o3t-'- I c--t * -- i C-t-' (!r) ; X Xt |' L3 | A",1d J"Jf- l'}'b | =5'ctT), T2ITL YLo+ a- "L/4 5 "A:;.1-.'a--, 4. (2 points) Use an identity to finfireal solution, )rudiun, of J- sin(2x) cos(3x) + JI sin(3x) cos(2x) = I . d z Lx. t',- {Dt L c_-} *=r- 1; ^ (xL,A)"-+l l r ,-{w ,+,c-E = "x ff tn c?r) cD/ (7r) v\$cca (zv)t;^ (lx) -- | f -- -} * .G l^. .-.\-^u rr,\ t- ^ -/- \-. ,r-il '1 tlz ( s,.,(zx) or G*-) + ccs (2") :;. (?x) s I (, ( 9;n(zy,?*)) : r, siyr-' e) "o o l*=*, \ / i:^E* " u,r" 9t= \ @ X ,, points) State theqeriod P of 1235 cos(!-, - i, * 772 = 1750 and find all sotutio.rs i" [O,fJ. t\ ' \ ?' A4 X :5 s'sq a^d ''lq )...
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