Question

-sin675 plse telll me this ans
wers​

Answer 1

Answer:

Step-by-step explanation:

- sin 675° = - sin(720° - 45°) =

= - sin(2×360° - 45°)

= - sin(- 45°)

= sin 45°

= 1 / sqrt(2)

N.B. sin x is periodisk med period

360°

sin x is en odd function thus

sin(- x) = - sin x.

Answer 2

-sin675 =sin(-675)

=sin(720-675)

=sin45 =1/√2