求各位大佬解答第37大题 急急急！！！ 5
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解:a在0-2π
(1)sina =-1/2 得a = π+π/6 =7π/6 或者 a = 2π-π/6 = 11π/6
(2)cosa = √3/2 得a =π/6 或者 a= 2π-π/6 = 11π/6
(3)tana = -√3/3 得 a = π-π/6=5π/6 或者2π-π/6=11π/6
(4)cota =1 得 tana =1 得 a = π/4 或者a=π+π/4 = 5π/4
(1)sina =-1/2 得a = π+π/6 =7π/6 或者 a = 2π-π/6 = 11π/6
(2)cosa = √3/2 得a =π/6 或者 a= 2π-π/6 = 11π/6
(3)tana = -√3/3 得 a = π-π/6=5π/6 或者2π-π/6=11π/6
(4)cota =1 得 tana =1 得 a = π/4 或者a=π+π/4 = 5π/4
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