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 ( 12+ )
Otras preguntas
HELP!!!!Question 1 (1 point) Question 1 Unsaved Unlike the Greek gods and goddesses, The Egyptian gods and goddesses are objective and emotionless. Question 1 o
What was an effect of japan's fighting with china in the 1930s?
What percentage of girls in the juvenile justice system have histories of physical abuse?
simplify this rational expression 5x^2+3x-11/x+3 the quotient is ___, and the remainder is ____
Why were Copernicus's ideas about the order of the universe deemed to be dangerous to Church thinking? A.) The Church was invested in the idea that the Earth
A charge q of 1.3 × 10-16 coulombs moves from point A to a lower potential at point B in an electric field of 3.2 × 102 newtons/coulomb. If the distance travele
Which infections can cause pelvic inflammatory disease (PID)? Check all that apply.
A farmer has a rectangular field with dimensions $2m+7$ and $m-2$. If the field has an area of 51 square units, what is the value of $m$?
every organism in an ecosystem relies on other species for survival
he sides of a square are five to the power of two fifths inches long. What is the area of the square?
