a) Given C + D = (22/7)/4. Prove that (1+ tanC)( 1+ tanD ) = 2
b) Using (a), deduced that tan[ (22/7) /8 ] = 2^(1/2) -1
Trigonometry - compound angles
2008-03-01 9:43 pm
回答 (1)
2008-03-02 12:54 am
✔ 最佳答案
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參考: ME
收錄日期: 2021-04-14 19:46:07
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