Մաթեմատիկա։ մայիսի 18-22

151.

ա) sin(-30)=-1/2

բ)cos(-π/3)= 1/2

գ)tg(-π/4)=-1

դ)tg(-5π/6)=-√3/3

ե)ctg(-135)=1

զ)ctg(-2π/3)=√3/3

152.

ա)

sin(25π/6)=1/2

cos(25π/6)=√3/2

tg(25π/6)=√3/3

ctg(25π/6)=√3

բ)

sin(840)=√3/2

cos(840)=-1/2

tg(840)=-√3

ctg(840)=-√3/3

գ)ctg(-420) = ctg(-60) = -ctg60 = -√3/3

դ) ctg(-3π/4) = -ctg(3π/4) = 1

ե) ctg(-5π/6) = -ctg(5π/6) = √3

զ) ctg(11π/4) = ctg(3π/4) = -√3

Թողնել պատասխան

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