Question

Aplicando as transformações trigonométricas,calcule:​

Answer 1

d) sen ( 4 π/3) = - √3/2

e) sen π/4 . cos π/3 - sen π/3 . cos π/4 =

√2/2 . 1/2 - √3/2 . √2/2 =

√2/4 - √6/4 =

(√2- √6)/4

i) cos ( 4 π/3) = - 1/2

j) cos (π/6) = √3/2