高中数学必考公式?1、两角和公式 sin#28A B#29=sinAcosB cosAsinB sin#28A-B#29=sinAcosB-sinBcosAcos#28A B#29=cosAcosB-sinAsinB cos
高中数学必考公式?
1澳门金沙、两[繁:兩]角和公式 sin#28A B#29=sinAcosB cosAsinB sin#28A-B#29=sinAcosB-sinBcosA
ctg#28A B#29=#28ctgActgB-1#29/#28ctgB ctgA#29 ctg#28A-B#29=#28ctgActgB 1#29/#28ctgB-ctgA#29
倍角公(读:gōng)式 tan2A=2tanA/#281-tan2A#29 ctg2A=#28ctg2A-1#29/2ctga
cos2a=cos2a-sin2a=2cos2a-1=1-2sin2a/2、半角[练:jiǎo]公【gōng】式[shì] sin#28A/2#29=√#28#281-cosA#29/2#29 sin#28A/2#29=-√#28#281-cosA#29/2#29
cos#28A/2#29=√#28#281 cosA#29/2#29 cos#28A/2#29=-√#28#281 cosA#29/2#29
tan#28A/2#29=√#28#281-cosA#29/#28#281 cosA#29#29 tan#28A/2#29=-√#28#281-cosA#29/#28#281 cosA#29#29
ctg#28A/2#29=√#28#281 cosA#29/#28#281-cosA#29#29 ctg#28A/2#29=-√#28#281 cosA#29/#28#281-cosA#29#29/3、和差化积 2sinAcosB=sin#28A B#29 sin#28A-B#29 2cosAsinB=sin#28A B#29-sin#28A-B#29
2cosAcosB=cos#28A B#29-sin#28A-B#29 -2sinAsinB=cos#28A B#29-cos#28A-B#29
sinA sinB=2sin#28#28A B#29/2#29cos#28#28A-B#29/2 cosA cosB=2cos#28#28A B#29/2#29sin#28#28A-B#29/2#29
tanA tanB=sin#28A B#29/cosAcosB tanA-tanB=sin#28A-B#29/cosAcosB
ctgA ctgBsin#28A B#29/sinAsinB -ctgA ctgBsin#28A B#29/sinAsinB/
4、某《读:mǒu》些数列【读:liè】前[练:qián]n项和 1 2 3 4 5 6 7 8 9 … n=n#28n 1#29/2 1 3 5 7 9 11 13 15 … #282n-1#29=n#2A2
5、圆的一般方程 x2 y2 Dx Ey F=0 注《繁:註》:D2 E2-4F
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高中数学必考公式定律【lǜ】 高中数学必考公式?转载请注明出处来源