Question

Calcule:

a) sen π/2
b) sen π/4
c) sen 110°
d) sen 30°​

Answer 1

a) sen π/2 = Sen 180/2 = Sen 90 = 1

b) sen π/4 = Sen 180/4 = Sen 45 = √2/2

c) sen 120° = Sen (180-120)=sen60= √3/2

d) sen 30° = 1/2

Answer 2

Oie, Td Bom?!

• Usando a tabela de valores trigonométricos ou círculo unitário, calcule as expressões:

a) $\sin( \frac{\pi}{2} ) = \boxed {1}$

b) $\sin( \frac{\pi}{4} ) = \boxed { \frac{ \sqrt{2} }{2} }$

c) $\sin(110°) ≈\boxed {0,939...}$

d) $\sin(30°) = \boxed { \frac{1}{2} }$

Att. Makaveli1996