rodelroberto rodelroberto
  • 03-11-2015
  • Mathematics
contestada

Verify
(2cos2x)/(sin2x) =cotx - tanx

Respuesta :

crisforp
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

Otras preguntas

can someone please help me​
During the Columbian Exchange, what kind of goods were traded from the Americas to Europe, Africa, and Asia? A. olives, grapes, and coffee beans B. wheat, rice,
My first language is Spanish, if you have homework or an exam you can talk to me and I will help you
your hands get warm by a fire because _____energy is converted into heat energy​
What is sin 28°? 62 17 8 28 90° 15
A rotameter calibration curve (flow rate versus float position) obtained using a liquid is mistakenly used to measure a gas flow rate. Would you expect the gas
What is one strategy that can help a person avoid spending too much money on interest when borrowing money? O A. Choosing a loan with a compound rather than sim
Please help me solve. - 4+(-3)
Solve 18.2 = y - 11 for y.
If we don’t count Xia as china’s first dynasty, how long is Chinese history?