heplmeplz
heplmeplz
14-03-2017
Mathematics
contestada
cos(3x) = cos^2x - 3sin^2x cosx
Respuesta :
jdoe0001
jdoe0001
14-03-2017
[tex]\bf cos(3x)\implies cos(2x+x)\\\\ \\\\ ------------------\\\\ \underline{cos(2x)} cos(x)-\underline{sin(2x)} sin(x) \\\\\\\ \underline{[1-2sin^2(x)]} cos(x)-\underline{[2sin(x)cos(x)]} sin(x) \\\\\\ cos(x)-2sin^2(x)cos(x)-2sin^2(x)cos(x) \\\\\\ cos(x)-4sin^2(x)cos(x)\\\\ ------------------\\\\ \boxed{cos(3x) \ne cos^2(x)-3sin^2(x)cos(x)}[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 33+ )
Otras preguntas
F (50 N) 30° d = 30 m How much the work that the man did on the slider ? * m
Which force DOES NOT contribute to metamorphism? A) The weight of overlying rocks B) Heat released during crystallization C)The internal heat of the Earth D)Hor
Solve the equation 40=2x2+2x by factoring.
Define sectionalism. What are some of the differences between the North and South that led to sectionalism?
Solve 9(2x – 3)2 + 7 = 448. Question 4 options: A) x = 5, –2 B) x = –5, 2 C) x = 5, 0 D) x = ±5
Which state official is in charge of elections? a. circuit clerk b. state auditor c. secretary of state d. processing attorney
could someone help with writing a fictional short story, any topic, including a climax, characters, dialog, theme, setting, etc.
Please help! I will mark as brainliest. <3
can you guys write apparel in a definition i need 2
All of the answers below tell a story. Look at all four answers and choose the Point (Main Idea). It's great to watch a movie in a comfy chair in your pajamas.
