Question

Dê o valor de a) sen 3 pi/2 b) sen pi c) sen 120 graus d) sen 150 graus e) 270 graus f) 300 graus g) sen 2 pi h) sen 330 graus

Answer 1

a) sen3Pi/2 = sen270 = -sen90 = - 1

b) senPi = sen180 = - sen0 = 0

c) sen120 = cos30 = v3/2

d) sen150 = cos60 = 1/2

e) ?

f) ?

g) sen2Pi = sen360 = sen0 = 0

h) sen330 = - cos60 = - 1/2

Answer 2

e)sen 225° = -sen 45° = -√2/2

f)sen 300° = sen 60° = -√3/2