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innieo
@innieo
July 2022
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cos^2x-cos2x=0,5 помогите, пожалуйста, с решением.
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uekmyfhfp
Cos^2 x - cos (2x) = 0,5;
cos^2 x - (cos^2 x - sin^2 x) = 0,5
cos^2 x - cos^2 x + sin^2 x = 0,5;
sin^2 x = 1/2;
;sinx = +-(sgrt1/2)= + - sgrt2/2.
x = pi/4 + pi*k /2
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Answers & Comments
cos^2 x - (cos^2 x - sin^2 x) = 0,5
cos^2 x - cos^2 x + sin^2 x = 0,5;
sin^2 x = 1/2;
;sinx = +-(sgrt1/2)= + - sgrt2/2.
x = pi/4 + pi*k /2