Question

sen(30 +a) + cos (60+a) = cos(a)

por favor, es urgentisimo

Answer 1

Sen(30 +a) + cos (60+a) = cos(a) sen30 +senA + cos60 + cosA = cosA

  \frac{1}{2} + senA + \frac{\sqrt{3}}{2} = 0

senA = - (