2015年高考广东卷(文科数学)试题及参考答案
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sin1ot“I’l.sin2o * sinccoscu - cos2a - |
17.(–{•¬‘è–ž•ª12•ª)
–^•éŽs100ŒË‹•–¯“IŒŽ•½‹Ï—p“Ô—Ê(’PˆÊ:“x),ˆÈ[160,180),[180,200),[200,220),
[220,240),[240,260),[260,280),[280,300]•ªâ™“I•p—¦•ª•z•é•ûŒ—”@•‘2.
0.01250.0110.0095
0.005
0.00250.002
160180200220240260280300 ŒŽ•½‹Ï—p“ÔL`“x•¢2
(1)‹•‹X•ûŒ—’†ƒÔ“l;
(2)‹•ŒŽ•½‹Ï—p“Ô—Ê“I—]•”˜a’†ˆÊ•”;
(3)•ÝŒŽ•½‹Ï—p“Ô—Ê—Í[220,240),[240,260),[260,280),[280,300]“IŽl•{—pŒË’†
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14
2sinccosa(2)Œ´Ž®=sin2c * sinacosa - 2cosza
2tana
tan ƒ¿ tt tanƒ¿ -2
=Šô=•ã
17. Šp‘•:(1)ƒÔ= [1 -(0.002+0.0095+0.011 +0.0125 +0.005 +0.0025)•~20]•€20
= 0.0075.
(2)ŒŽ•½‹Ï—p“Ô—Ê“I—]•”—Í•p—¦•ª•z‹X•û•‘•Å•‚‹éŒ`“I’†“_,ŒÌŒŽ•½‹Ï—p“Ô—Ê“I—]
•”—Í230.•p—¦•ª•z‹X•ûŒ—’†,’†ˆÊ•”•¶•Ó•é‰E•Ó‹X•û•‘–ÊŽß‘Š“™,ŒÌŒŽ•½‹Ï—p
“Ô—Ê“I’†ˆÊ•”—Í224.
(3)•ª•˜‘è–v“I•p—¦•ª•z‹X•û•‘’m“¹:•Ý[220,240),[240,260),[260,280),
[280,300]Žl•{—pŒË’†‹¤—L[(0.0125+0.0075+0.005+0.0025)•~20]•~100
=55(ŒË),‘´’†•Ý[220,240)’†—L0.0125•~20•~100=25(•º),ˆö•Ÿ,•Ý•Š’ŠŽæ
“IHŒË’†•x•½‹Ï—p“Ô—Ê•¢"Q%‚Ì‘âŒË•ã’ŠŽæ‰_•~H=51•¡•t
16‚Rˆê•¬•yˆê•]•E‚Q•¬•\•Aˆí”q‘è:–{‘å‘苤10•¬‘è,–ˆ•¬‘è5•ª,–ž•ª50•ª.
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