Question

Pomocy ;)

Oblicz wartości pozostałych funkcji trygonometrycznych (sinus, tangens, cotangens), jeśli sin alfa= 1/4.

Answer 1

sin alfa = 1/4

więc  y = 1   oraz  r = 4

x^2 + y^2 = r^2

x^2 = r^2 - y^2 = 4^2 - 1^2 = 16 - 1 = 15

x = - p(15)  lub   x = p(15)

cos alfa = x/r = -p(15)/4

lub

cos alfa = p(15)/4

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tg alfa = y/x = 1/[ -p(15)] = - p(15)/ 15

lub

tg alfa = 1/ p(15) = p(15)/15

============================

ctg alfa = x/y = - p(15)

lub ctg alfa = p(15)

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Answer 2