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 ( 71+ )
Otras preguntas
Two ways of calculating average returns are ______ and ______. Multiple select question. the arithmetic average the progressive average the geometric average th
Why was there more carbon-14 in the germinated seed?.
Although Spanish is not the official language of the United States, why is it often listed as one of the "Spanish-speaking" countries in textbooks?
Your friend phred says ""i decided to make one of those online personality tests as a project in my psychology class. how hard can it be?"" part a: explain whet
Write an informative essay comparing a democracy to a dictatorship. The essay should describe who rules, how leaders come to power, and what rights and freedoms
A disk of radius a has a total charge Q uniformly distributed over its surface. The disk has negligible thickness and lies in the xy plane. What is the electri
For this assignment, you choose between two different types of essays:An essay that focuses on what a character learns over the course of a story, orAn essay th
The regular octagon shown is enlarged so that its side are 3 times as large. What affect does this have on the perimeter?
explain what operation should be used to solve the equation 3.5n= 10.5 what is the value of n?
The number 144 can be represented by 12x12 square grid which of the following can be also represented on a square grid?? A. 39 b.50 c.70 d.81
