pottersheep
  • pottersheep
I need Trig Identity help please..! (Grade 12) How do I prove... (cos2x/1+sin2x) = tan(pi/4- x)
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
tkhunny
  • tkhunny
You have written this: \(\dfrac{\cos(2x)}{1} + \sin(2x) = \tan(\frac{\pi}{4} - x)\). Is this what you intend?
pottersheep
  • pottersheep
Ohhhhh you are right my mistake!
pottersheep
  • pottersheep
It should be (cos2x/(1+sin2x) = tan(pi/4- x)

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
\[\frac{\cos^2(x)}{1+\sin^2(x)}\]?
pottersheep
  • pottersheep
No, They are not to the power of 2, they are just 2x :)
tkhunny
  • tkhunny
Well, it certainly looks like an exercise in double angles. Perhaps expanding all three expressions will lead to something.
pottersheep
  • pottersheep
hmm
pottersheep
  • pottersheep
im still stuck :(
pottersheep
  • pottersheep
I THINK I GOT IT :)
pottersheep
  • pottersheep
yay double angles worked~~~!!
tkhunny
  • tkhunny
Let's see your work and perhaps we can untangle it. \(\cos(2x) = \cos^{2}(x) - \sin^{2}(x) = 1 - 2\sin^{2}(x) = 2\cos^{2}(x) - 1\) \(\sin(2x) = 2\sin(x)\cos(x)\) You may wish to convert the tangent to sine/cosine. Really, the idea behind these things is to get you to EXPLORE these relationships. Don't expect to see a clear solution right away. Play with it until somthing pops out.
sirm3d
  • sirm3d
@pottersheep do you need hint?

Looking for something else?

Not the answer you are looking for? Search for more explanations.