Ответ:
a)2Tg3π/4•Ctg3π/4=2
b)Sin²30°+Cos²30°+Sin3π/2•Cosπ/6=1+(-1)√3/2=1-√3/2
d)Sin270°+2Cos90°+3Sin180°=-1+0+0=-1
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Ответ:
a)2Tg3π/4•Ctg3π/4=2
b)Sin²30°+Cos²30°+Sin3π/2•Cosπ/6=1+(-1)√3/2=1-√3/2
d)Sin270°+2Cos90°+3Sin180°=-1+0+0=-1