4-6 срочно,пожалуйста
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6) 3p/2 sin^2a+cos^2a=1 cosa=√(1-sin^2a) = √(1-49/625 ) = √576/625 = 24/25 5)1-sin^2a-cos^2a=1-(sin^2a+cos^2a) = 1-1=0 4) a)=sin(73-13) = sin60 = √3/2 b)cos2*π/12 =cosπ/6 = √3/2
sin^2a+cos^2a=1
cosa=√(1-sin^2a) = √(1-49/625 ) = √576/625 = 24/25
5)1-sin^2a-cos^2a=1-(sin^2a+cos^2a) = 1-1=0
4)
a)=sin(73-13) = sin60 = √3/2
b)cos2*π/12 =cosπ/6 = √3/2