Найдите tg a если cos a = корень из 3/2
[tex]cos a= \frac{ \sqrt{3} }{2} [/tex]
[tex]cos a= \frac{ \sqrt{3} }{2} [/tex]
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Answers & Comments
cosα=?
sin²α+cos²α=1
(-√3/2)²+cos²α=1
cos²α=1-3/4. cosα=+-√(1/4). cosα=+-1/2
α∈(π;1,5π) =>cosα<0
cosα=-1/2
cosα=-0,5 вродебы я точно не знаю(