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# 7.5. new pdf - n 7.5 Double-angle and Half-angle Formulas...

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Unformatted text preview: n 7.5 Double-angle and Half-angle Formulas Double —angle Formulas: Sill mg :9 {3052* ~— 3111‘“ 9 1 — 2 511:1 29:332 —1 9a 1+cwa 2a 1—cma cmﬁ;= tm1—= 2 2 A, 2 2 1+cma Half —angle Formulas: 1. Use Double-angle Formulas to Find Exact Values h 2 637-: \, aim was [mm/m H m adj/f COSQ:_§ 7r< 3‘1!— LQLM‘L,L\ Wag "‘H—o‘f i a; 3am+ [mm LP“ >9 ﬁn26 Siege: & an‘E‘Cosa /3 . /__.2_ @f’Vﬂ/‘ﬂ @035”:— -—-:= “=3 f b '1 ‘12 r; Xv“, : g2. elf-1H -: b LHLU’L-r. 2—5“ ‘jl: ‘Z—l Haifa? Sunglﬁﬂ ’5 ‘ r“ #2. LP“; ‘ 2 a 315-.)(1) 2., +44 (5:919 5 b a; 03939: acesng 1 \$1 22%) 5-~ I I? : a ELF—W 35 : 5:2,! 25 :_ ‘ 1 @[k‘v‘am bane :- L} .___——- l gimu. H {'5 in Wawdmryiu Jaw: :i: g, wi X 2 l, . 2— (— X+ c—r‘ 8“ a: 5—; “CE-2“”..L'4 Hmclf: k2“ m r m W ' -. :1 aosgzi;w—_g::r£q; 16+! _r Y J”? W J1? i” . Siﬁae ‘; 3%?”09 @039 ‘2 31 (d; JTEf QH' 3mm: é _ \$1109 i? W19“ "ﬂ": / l oase- Cos29 : @039? Sin 9- ' ‘ SIOZQ‘ 2L '2, , A 1 "2;; I 352-) @0329 hi?) - (JV-k is. .2.(—.1:>: ‘1 __.L..q_. lg, I‘?‘ I? I _ , q I? (1% a 1% 3. Use Half—angle Formulas to Find Exact Values If csca=~«:: and 0515 in quadrant IV, ﬁnd sing, 005%, and tan—‘5. 2 2. Use Double-angle Formulas to Establish Identities Use a half-angle formula to ﬁnd the exact value of tangg. gl‘ﬁol raosok (are) -' EW%;" “Banal M 60\$“ ' Find the exact value of sin£2ta1fl£ 3 4 n. ...
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7.5. new pdf - n 7.5 Double-angle and Half-angle Formulas...

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