Oblicz: sin 120 * tg 300 / (cos 210 * tg 150)
sin 120⁰=sin (180⁰-60⁰)=sin60⁰=√3/2
tg300⁰=tg(180⁰+120⁰)=tg120⁰=tg(90⁰+30⁰)=- ctg 30⁰= - √3
cos 210⁰=cos (180⁰+30⁰)= - cos 30⁰= - √3/2
tg150⁰=tg(180⁰-30⁰)= - tg30⁰=- √3/3
√3/2 * (-√3) / ( -√3/2 * (-√3/3)= -3
rozwiazanie w załączniku
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sin 120⁰=sin (180⁰-60⁰)=sin60⁰=√3/2
tg300⁰=tg(180⁰+120⁰)=tg120⁰=tg(90⁰+30⁰)=- ctg 30⁰= - √3
cos 210⁰=cos (180⁰+30⁰)= - cos 30⁰= - √3/2
tg150⁰=tg(180⁰-30⁰)= - tg30⁰=- √3/3
√3/2 * (-√3) / ( -√3/2 * (-√3/3)= -3
rozwiazanie w załączniku