solve the equation fo 0<x<360
correct your answer to 1 d.p.
1.
(5 tan^2 x-4)/(tan^2 x+1) = 1
2.
cos2x=0.4
math more about trigonormetry
2011-04-27 8:37 am
回答 (1)
2011-04-27 8:55 am
收錄日期: 2021-04-23 20:43:35
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