rodelroberto
rodelroberto
03-11-2015
Mathematics
contestada
Verify
(2cos2x)/(sin2x) =cotx - tanx
Respuesta :
crisforp
crisforp
03-11-2015
cos2x = (cosx)^2 - (sinx)^2;
sin2x = 2sinxcosx;
Then, (2cos2x)/(sin2x) =2[ (cosx)^2 - (sinx)^2 ] / (2sinxcosx) = [ (cosx)^2 - (sinx)^2 ] / (sinxcosx) = (cosx)^2 / (sinxcosx) - (sinx)^2 / (sinxcosx) = cosx/sinx - sinx/cosx = cotx - tanx;
Answer Link
VER TODAS LAS RESPUESTAS ( 63+ )
Otras preguntas
Two soccer players start from rest, 42 m apart. They run directly toward each other, both players accelerating. The first player’s acceleration has a magnitude
When the two mutations are on the same chromosome, the arrangement is called the: a. coupling configuration b. cis configuration c. repulsion configuration d. c
The energy of a photon is E=\frac{hc}{\lambda}E = h c λ where c is the speed of light and h is a constant known as Planck's constant. If a red photon has twice
Kara looks out her window and sees something moving in the fog. First, she notes the direction of the movement, then notices the size. Next she realizes the mov
Why do dark -colored shirts get hotter in the sun than light-colored shirts?
Given that 2( -x + 4) = 3 , prove that x = 5/2 I need some help pleaseee (Write out the steps)
How does the use of light and color in this painting express emotion? The dark colors express anger and irritation. The contrasting colors create excitement. Th
The formula for 100 mL of pentobarbital sodium elixir calls for 0.75 mL of orange oil. Using alcohol as a diluent and a 10-mL graduate calibrated in 1-mL units,
Suppose two individuals develop benign (non-cancerous) tumors that produce symptoms because they occupy space and crowd adjacent organs. If one of these persons
Give three examples of heterogeneous mixtures and three examples of solutions that you might use in everyday life.
