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 ( 25+ )
Otras preguntas
why do scientists assign each organism a universally accepted name?
hw : What if kids ruled the world
The United States has some of the world’s largest resources of all of the following minerals except __________. a. silver b. gold c. diamonds d. copper
Which words are an example of a slant rhyme? A. pilot and lieth B. thou and know C. tide and ride D. mask and mile
What happened to Chinese scholars during the Mongol rule? Please answer if you know it.
An animal without a body cavity is called A. atypical B. acentric C. acoelomic D. asymmetrical
What is a motif? a. a repeated element b. something that is used to stand for something else c. the main idea d. a message or main idea
Chintu and raven build a roccket, which moved from the earth to about 86m into the shy. It tales 3.7 seconds to reach the rocket highest point . what is his sp
what percentage of your body is made from water
Ricardo has read 2/3 of a book. Lin had read 2/4 of the same book. Who read more of the book?
