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 ( 91+ )
Otras preguntas
How many hydrogen atoms are there in 3.50 grams of methane?
Heating and/or agitation of egg whites results in:
A wave traveling in water has a frequency of 250 Hz and a wavelength of 6.0 N. What is the speed of the wave?
Which point is a reflection of point R (-2, 9) first across the y-axis and then across the x-axis? A : (-9, -2) B: (-2,-9,) C: (2, -9) D: (9, -2)
Use the graph to find the local minimum and the local maximum for the given function.
Need help ASAP. Please! Thank u☺️
Noreen asserts that our behavior is motivated by inner forces and conflicts about which we have little awareness or control. this viewpoint is most consistent w
Which program was created in 1933 to build things like roads and national parks?]?
Guys I need the know what is the best counterpoint for using a smartphone is bad for your eyes?
answer 2 questions pls 1)x is how many percent less then 5x? 2)What is 1/6 of 9/2 of 8/5?
