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標題:
急! F4 Basic Trigonometry ex
發問:
請詳細步驟教我計以下三條: (不要綱址回答) Solve the following equations, where 0度<=x<=360度 1. tan3x=1.732 2. sin2x=0.348 3.cos x/3=0.7651 更新: 第3題應該是 : cos 3x=0.7651
最佳解答:
1) tan 3x = 圖片參考:http://www4a.wolframalpha.com/Calculate/MSP/MSP95081a3e5ad3dd0446fd00001fg3iche2285ehfh?MSPStoreType=image/gif&s=61&w=25&h=20 3x = 60 , 240 , 420 , 600 , 780 , 960 x = 20 , 80 , 140 , 200, 260 , 320 2) sin 2x = 0.348 2x = 20.365 , 159.635 , 380.365 , 519.635 x = 10.183 , 79.817 , 190.183 , 259.817 3) cos 3x = 0.7651 3x = 40.084 , 319.916 , 400.084 , 679.916 , 760.084 , 1039.916 x = 13.361 , 106.639 , 133.361 , 226.639 , 253.361 , 346.639
急! F4 Basic Trigonometry ex
發問:
請詳細步驟教我計以下三條: (不要綱址回答) Solve the following equations, where 0度<=x<=360度 1. tan3x=1.732 2. sin2x=0.348 3.cos x/3=0.7651 更新: 第3題應該是 : cos 3x=0.7651
最佳解答:
1) tan 3x = 圖片參考:http://www4a.wolframalpha.com/Calculate/MSP/MSP95081a3e5ad3dd0446fd00001fg3iche2285ehfh?MSPStoreType=image/gif&s=61&w=25&h=20 3x = 60 , 240 , 420 , 600 , 780 , 960 x = 20 , 80 , 140 , 200, 260 , 320 2) sin 2x = 0.348 2x = 20.365 , 159.635 , 380.365 , 519.635 x = 10.183 , 79.817 , 190.183 , 259.817 3) cos 3x = 0.7651 3x = 40.084 , 319.916 , 400.084 , 679.916 , 760.084 , 1039.916 x = 13.361 , 106.639 , 133.361 , 226.639 , 253.361 , 346.639
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