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 ( 72+ )
Otras preguntas
To which part of the electromagnetic spectrum does a wave of frequency 5×1019 hz belong.
Why were the soldiers in Massachusetts called minutemen? Why do you think the four thousand colonists in the forest were able to kill so many English soldiers?
Which compound has both ionic and covalent bonding?.
freud compared the human personality to an iceberg because
Which phrase best completes this diagram? Features of the Gupta Empire Gave emperor total power Encouraged trade with other countries 2 A. Focused on religion r
Which sociological perspective would most likely study the new social roles assumed by activists within a social movement
How to tell if ratios are equivalent.
Read this excerpt from an article about inventor Mary Anderson. Riding a trolley on a rainy day in New York City, Anderson noticed that the rain made it hard fo
Help me With this please
How do plants and animals Interact with air in different ways
