sin(п/2+х) tg(п+х) sin 11п/3 tg21п/4 cos 150 ctg17п/6 помогите решить!. Created by nika1299. matematika-ru

6 помогите решить!...

July 2022 1 13 Report

sin(п/2+х)
tg(п+х)
sin 11п/3
tg21п/4
cos 150
ctg17п/6
помогите решить!

Answers & Comments

yarovoe Sin(п/2+х)=cosxtg(п+х)=tgx
sin 11п/3=sin(4п-п/3)=-sinп/3=√3/2
tg21п/4=tg(5п+п/4)=tgп/4=1
cos 150°=cos (180° -30°)=-cos30° =-√3/2
ctg17п/6=ctg(3п-п/6)==-ctgп/6=-√3

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