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

Otras preguntas

In the ____________________ approach, the project is initiated by upper-level managers who issue policy, procedures and processes, dictate the goals and expecte

The number of daily newspapers in a country were 2,401 in 1900 and 1,303 in 2010. The percentage change is ____%. (Round the final answer to the nearest integer

Melody's car was damaged when another driver ran a stop sign and hit her car. Melody decided to collect from her own insurer and to let her insurer recoup the l

Give an example of a person interacting outside of a market?

Your friend Jerome has lost his contact lens in his room. He begins searching in one corner and methodically moves from right to left and then back from left to

Research the sinking of the passenger ship The Lusitania and share your findings. Why was its sinking controversial? Did the Germans have a right to sink the sh

A bus leaves a terminal traveling at a rate of 45 miles per hour. When the bus has traveled 90 miles, a car leaves the same terminal, traveling at a rate of 60

According to a recent Pew Research Center poll, young adults are substantially more likely than senior citizens to support: a. strengthening social security.

three strategies the ministry of culture may use to encourage artistes to create music featuring the Caribbean rhythm

What’s the answer for D