sin7.5°5″等于多少
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10
=292°20'
题好像有问题.720/24=3030/6=5720/5=144
8,45,10,0.4
176°48′56″除以5=175°108‘56’‘÷5=175°105’236‘’÷5=37°21‘47.2’‘
1.[sin7°+cos15°sin8°]/[cos7°-sin15°sin8°]=[sin(15°-8°)+cos15°sin8°]/[cos(15°-8°)-sin15°sin8°]=【sin15
215
2.236067977计算时,取2.236就行了
5分之三1530
sin186º=sin(180º+6º)=﹣sin6º为负tan505°=tan(540º-35°)=﹣tan35º为负sin7.6π=si
sin8°+sin7°cos15°)÷(cos8°-sin7°sin15°)=(sin(15-7)+sin7cos15)/(cos(15-7)-sin7sin15)----两角和公式=(sin15co
5*5x等于多少5*5x=25x
2.2360679774997896964091736687313
原式=(sin(15°-8°)+cos15°sin8°)/(cos(15°-8°)-sin15°sin8°)=(sin15°cos8°+cos15°sin8°-cos15°sin8°)/(sin15°
sin8°+sin7°cos15°=sin(15°-7°)+sin7°cos15°=sin15°cos7°-sin7°cos15°+sin7°cos15°=sin15°cos7°cos8°-sin7°
11
30
21°17′×5=105°85‘=106°25’151°÷3==(150°+60‘)÷3=50°20’
10再答:8
15.70796325