1) Вычислить: tg585 + cos1500 - cos1080=,, 2) tg (2 arctg (0.5)) =...

Question

1) Вычислить: tg585 + cos1500 - cos1080=,, 2) tg (2 arctg (0.5)) =...

Answer 1

1) tg(360+180+45)+cos(360+360+360+360+60)-cos(360+360+360)=tg45+cos60-cos0=1+1/2-1=1/2=0.5

 

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