Question

Trigonometria

Calcule.

a) sen1110°
b) tg765°
c) cos25π/3
d) sen29π/3
e) cos(-2310°)
f) cos1770°


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Answer 1

A) sen 1110°

sen 1110° = sen 30° =

B) tg 765°

tg 765° = tg 45° = 1

C) cos (-2310°)

cos(-2310) = cos(-150º) = cos(210°) = cos(180°+30°) = - cos(30°) = -√3/2

D) sen (-840°)

E) cos 1770°

Espero ter ajudado