Ask your own question, for FREE!
Mathematics 20 Online
OpenStudy (kaylala):

topic: PROVING IDENTITIES - help me please (SEE COMMENTS) (trigonometry)

OpenStudy (kaylala):

[(2+csc x)/(sec x)] - 2 csc x = cot x

OpenStudy (kaylala):

@SolomonZelman help again

OpenStudy (e.mccormick):

Did you try putting things in terms of sine and cosine? Also, you probably need to get things over a common denominator.

OpenStudy (kaylala):

i'm really sorry but i dont really know how to start this i tried once but i failed @e.mccormick

OpenStudy (e.mccormick):

Well, what did you try?

OpenStudy (kaylala):

it's wrong anyway @e.mccormick and i didnt finish it all i did was split up the fractions

OpenStudy (kaylala):

so help???

OpenStudy (e.mccormick):

If you think about it for a second, \(\cot = \dfrac{\cos}{\sin} = \dfrac{\csc}{\sec} \) So if you move towards either of those forms, you are getting the answer. That means getting things into one fraction, not breaking them up.

OpenStudy (cwrw238):

convert the terms to sin and cos and simplify left hand side is one way to do it

OpenStudy (cwrw238):

right hand side = cos x / sin x simplify LHS to get the same

OpenStudy (kaylala):

how'd you do that? i'm really sorry. i'm new to this topic

OpenStudy (kaylala):

@e.mccormick

OpenStudy (kaylala):

@cwrw238

OpenStudy (kaylala):

|dw:1389542454468:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!