Cos2x=3/(2*2^(1/2)) срочно!!!cos2x=3/2√2

Question

Cos2x=3/(2*2^(1/2)) срочно!!!
cos2x=3/2√2

Answer 1

Cos2x=(3*√2)/(2√2*√2)
cos2x=3√2 /4                       √18/√16=√9/8>1
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