20-05-2016
Mathematics

contestada

Cos3x+cosx=2cos2xcosx

Respuesta :

GreenEyes71 GreenEyes71

21-05-2016

[tex]cos(3x)+cos(x)=2\cdot cos\left(\dfrac{3x+x}{2}\right)\cdot cos\left(\dfrac{3x-x}{2}\right)=2\cdot cos(2x)\cdot cos(x).[/tex]

Green eyes.

Answer Link

Otras preguntas

Find the measure of ∠B.

Study the equation from part c. What operation must you preform to both sides of the equation to get x by itself on the right side?

Question 1: How did the French respond to Napoleon's economic and social reforms?

1. Describe the "Image Critique" process that the author conducts with his photography students? 2. Why does the author require his photography students to rema

Let f(x) = 2x2 and g(x) = x2-1. Then f(g(2)) =

Write the equation of the line in slope intercept form that passed through (1, 4) and (3, 18)

Who think they can figure out this equation for me

What is the highest peak of the African continent? Mountain wise.

Helen Keller is an example of a well-known member of the Deaf community, though she was also blind. As a child, Helen developed her own version of home signing

Please answer the questions below. 1. How would you describe the setting the time and the place) of this story? What details help you describe the setting? Push