Question

Resolva as equações trigonométricas
A) Sen 90° + Cos X = Tg 45°
B) 2 Cos 2x = 1
C) 3 Tg 4x = √3
D) Sen X + Cos 45° =Tg 45°

Answer 1

a) 1 + cos x = 1 -> cos x = 0 , logo x = 90° ou x = 270°

b) 2 cos 2x = 1 -> cos 2x = 1/2 , logo x = 30°

c) 3 tg 4x = √3 -> tg 4x = √3/3 -> , logo x = 7,5°