Cos x= - корень из 3/2

Question

Cos x= - корень из 3/2

Answer 1

Cos x = -(√3)/2
x iz II. ili III.kvadranta
II.kv.: x=5π/6

III.kv.:x=7π/6
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x=5π/6+2k.π , x=7π/6 +2k.π
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