Odpowiedź:
a ) f ( π/3 ) = sin ( 2* π/3) = sin [tex]\frac{2\pi }{3} = sin 120^o = sin ( 90[/tex][tex]^o + 30^o )[/tex] = cos 30° = [tex]\frac{\sqrt{3} }{2}[/tex]
b ) f ( π /3) = cos (2* π/3) = cos [tex]\frac{2\pi }{3}[/tex] =[tex]= cos 120^o = cos ( 90^o + 30^o) = - sin 30^o = - 0,5[/tex]
c ) f ( π/4) = tg ( 4*π/4 ) = tg π = tg 180° = 0
d ) f ( π/ 4 ) = ctg ( 4*π/4) = ctg π - nie istnieje
e ) f ( [tex]\frac{3\pi }{2} ) = sin ( 2* \frac{3\pi }{2} ) = sin 3\pi = sin (2\pi + \pi ) = sin \pi = 0[/tex]
f ) f ( [tex]\frac{3\pi }{2} ) = cos \frac{3\pi }{2} = cos 270^o = 0[/tex]
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Odpowiedź:
a ) f ( π/3 ) = sin ( 2* π/3) = sin [tex]\frac{2\pi }{3} = sin 120^o = sin ( 90[/tex][tex]^o + 30^o )[/tex] = cos 30° = [tex]\frac{\sqrt{3} }{2}[/tex]
b ) f ( π /3) = cos (2* π/3) = cos [tex]\frac{2\pi }{3}[/tex] =[tex]= cos 120^o = cos ( 90^o + 30^o) = - sin 30^o = - 0,5[/tex]
c ) f ( π/4) = tg ( 4*π/4 ) = tg π = tg 180° = 0
d ) f ( π/ 4 ) = ctg ( 4*π/4) = ctg π - nie istnieje
e ) f ( [tex]\frac{3\pi }{2} ) = sin ( 2* \frac{3\pi }{2} ) = sin 3\pi = sin (2\pi + \pi ) = sin \pi = 0[/tex]
f ) f ( [tex]\frac{3\pi }{2} ) = cos \frac{3\pi }{2} = cos 270^o = 0[/tex]
Szczegółowe wyjaśnienie: