tan15度等于几分之几

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tan15度等于几分之几

tan15°
=tan(60°-45°)
=(tan60°- tan45°)/(1+ tan60°*tan45°)
=(根号3 -1)/(1+根号3）
=(根号3-1)*(根号3-1)/[(根号3+1)(根号3-1)]
=(4-2根号3)/2
=2-根号3

tan15度等于多少 sin105度等于几分之几 cos30度等于几分之几 0.375等于几分之几?0.625等于几分之几? 3.5等于几分之几,2.5等于几分之几 0.35等于几分之几0.36等于几分之几 12.5%等于几分之几 0.75%等于几分之几 0.48等于几分之几,1.2等于几分之几 4.375等于几分之几 1.8等于几分之几 4.5等于几分之几 1.68等于几分之几