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 ( 33+ )
Otras preguntas
What value of x makes this equation true? 6x - 3 = 5x - 5
32 minus what equals = 67
if y=3 when x=4,find y when x=6
What do you think the Kanamits' greatest weapons were against the humans? Why?
Venture smith a slave who bought his freedom 1700 is commonly known as the black version and f what character? A(Paul Bunyan b) Jesse James's) Robin Hood d) Joh
Which statement best describes the contributions of Fredrick Douglas during the civil war? 1. Douglas was an abolitionist who served the Union in the 54th Massa
Which hard engineering strategy involves removing meanders?O Dams and reservoirsOEmbankmentsO StraighteningOFlood relief channels
I told you I would always come for you. Why didn't you wait for me? What can I do for you? Based on the quotes, what type of character is speaking? dynamic mino
100 Points help!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Name the five groups of bone surface markings
