Oblicz : stopni - s1) tg100s * cos240s + sin135s * ctg315s2) sin315s * cos210s + tg225s * ctg330s
1)
tg (180-a)= -tg a
cos (360-a)= cos a
sin (180-a)= sin a
ctg (270+a)= -tg a
tg (180-80)= -tg 80= -5,6713
cos(180+60) = - cos 60
sin (180-45)= sin 45
ctg (270+45)= -tg 45
b) sin(270+45)= - cos 45
cos(180+30)= - cos 30
tg((180+45)= tg 45
ctg (270+60)= -tg 60
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1)
tg (180-a)= -tg a
cos (360-a)= cos a
sin (180-a)= sin a
ctg (270+a)= -tg a
tg (180-80)= -tg 80= -5,6713
cos(180+60) = - cos 60
sin (180-45)= sin 45
ctg (270+45)= -tg 45
b) sin(270+45)= - cos 45
cos(180+30)= - cos 30
tg((180+45)= tg 45
ctg (270+60)= -tg 60