... )2 + (1 – cot ) = 2 (cosec2 )2 = 1 + cot2 ) = RHS + 2 cot + 1 + cot2 – 2 cot ) (v) (tan )2 = 4 + cot )2 – (tan – cot ( 1+ cot2 = cosec2 LHS = (tan )2 ...
確定！ 回上一頁
