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marjamasha
@marjamasha
March 2022
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√2sin 13П/8*cos 13П/8 помогите пожалуйста
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uekmyfhfp
Sgrt 2 * sin 13pi/8 * co s13pi/8 =
= sgrt 2 / 2 * (2 sin 13pi/8 * cos 13pi/8) = = sgrt2/2 * sin(13pi/4) =
= sgrt2/2 * sin( 2 pi + 3 pi/4) = sgrt2/2 * sin 3pi/4=
sgrt2/2 * sgrt2/2= 2/4 = 0,5
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Answers & Comments
= sgrt 2 / 2 * (2 sin 13pi/8 * cos 13pi/8) = = sgrt2/2 * sin(13pi/4) =
= sgrt2/2 * sin( 2 pi + 3 pi/4) = sgrt2/2 * sin 3pi/4=
sgrt2/2 * sgrt2/2= 2/4 = 0,5