heplmeplz heplmeplz
  • 14-03-2017
  • Mathematics
contestada

cos(3x) = cos^2x - 3sin^2x cosx

Respuesta :

LammettHash
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

Otras preguntas

Which academic skill allows people to explore new concepts? A. writing B. reading C. time management D. math
!ASAP 10 points!!! What is the value of y?
Let A, B, C and D be sets. Prove that A \ B and C \ D are disjoint if and only if A ∩ C ⊆ B ∪ D
Last year your company built 1,500,000 units of product Able and sold 1,405,000 After 14 months in R&D, a revision of product Able is due out tomorrow, on J
Select the correct definition of the term "comparative advantage." the ability to produce a good or service at a lower opportunity cost than another the ability
How do you calculate the acceleration of gravity?
what is gods promise about the rainbow and also are you a christin
which of The two EHR products would you recommend for the physicians. Explain why
What impact might child labor have had on the children themselves Plz answer quickly
based on the information from the lecture which artist(s) created the piece below?​