heplmeplz
heplmeplz
14-03-2017
Mathematics
contestada
cos(3x) = cos^2x - 3sin^2x cosx
Respuesta :
LammettHash
LammettHash
14-03-2017
[tex]\cos3x=\cos(2x+x)=\cos2x\cos x-\sin2x\sin x[/tex]
[tex]=(\cos^2x-\sin^2x)\cos x-2\sin^2x\cos x[/tex]
[tex]=\cos^3x-3\sin^2x\cos x[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 11+ )
Otras preguntas
3 ( 4d + 1 ) - 9d = 6 - 2d
what type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
A light plane flew from its home base to an airport 255 miles away. With a head wind, the trip took 1.7 hours. The return trip with a tail wind took 1.5 h
two methods of active transport
Your model locomotive is 18 inches long. It is an exact model of a locomotive that is 72 feet long. A window on the locomotive is how many times wider than a wi
what are three ways water erodes the surface of earth
36 is _______% less than 60?
Why did Henry Clay group his resolutions in pairs in the Compromise of 1850?
What's breed of given cat???Check attachment
2 ( 4a - 12 ) + 3a = 6a + 1
