tanα+tanα=? tanα-tanα=? 2tanα=? (1+tanα)/(1-tanα)=? (1-tanα)/(1+tanα)=?一定要准确啊,考试要用到了

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tanα+tanα=? tanα-tanα=? 2tanα=? (1+tanα)/(1-tanα)=? (1-tanα)/(1+tanα)=?一定要准确啊,考试要用到了

tanα+tanα=? tanα-tanα=? 2tanα=? (1+tanα)/(1-tanα)=? (1-tanα)/(1+tanα)=?一定要准确啊,考试要用到了
tanα+tanα=? tanα-tanα=? 2tanα=? (1+tanα)/(1-tanα)=? (1-tanα)/(1+tanα)=?
一定要准确啊,考试要用到了

tanα+tanα=? tanα-tanα=? 2tanα=? (1+tanα)/(1-tanα)=? (1-tanα)/(1+tanα)=?一定要准确啊,考试要用到了
tanα+tanα = 2tanα = 2(sinα)/(cosα)

tanα-tanα = 0
2tanα = 2(sinα)/(cosα)
(1+tanα)/(1-tanα) = (tan45°+tanα)/(1-tan45°tanα) = tan(α+45°)
(1-tanα)/(1+tanα) = (tan45°-tanα)/(1+tan45°tanα) = tan(45°-α) = -tan(α-45°)