princess46764
princess46764 princess46764
  • 15-06-2017
  • Mathematics
contestada

cos 2x cos x − sin 2x sin x = radical 3 /2

Respuesta :

mreijepatmat
mreijepatmat mreijepatmat
  • 15-06-2017
cos2x.cosx - sin2x.sinx = cos(2x+x)

cos(2x+x) = cos(3x) = (√3)/2

cos⁻¹ (√3/2) = 30°, so x =30/3 = 10°

Answer Link

Otras preguntas

Briefly describe the Nuremberg trials.
difference between an alcohol and an ether?
When an 18-month-old throws a temper tantrum because he can't have a cookie, he is demonstrating that he has not yet developed:
How do I add -6 and positive 13
Craig has 72 feet of material to build a fence around a rectangular flower bed on his property. If the width of the fence must be 3 feet, what is the length of
Which statement best explains the meaning added by the allusion in this excerpt? Alluding to Pompey's Porch reminds the audience of the importance of Pompey to
Find the distance between the given points. W(0, 8) and X(0, 12) Distance = 4 4√(13) 10
What happens in a blood sample of individuals who carry the sickle cell allele when the blood is derived in oxygen
Rebecca has 45 coins, all nickels and dimes. The total value of the coins is $3.60. How many of each type of coin does Rebecca have?
The graph below plots a function f(x): graph of line segment going through ordered pairs 0, 100 and 3, 220 If x represents time, the average rate of change of