I am a Mathematics Major, you can ask me to help you do your assignments in mathematics, you can also ask me to answer a few problems that i can.. I can do algebra, trigonometry, geometry and calculus, some other subjects too sometimes. I can assure that there would be sense in my computations and not just a child's work..

thanks for consulting. i wont mention your name, but i hope this helps for others who might encounter the same problem..

Verify the following identity:
(1-cos(2 x))/(1+cos(2 x)) = tan(x)^2
Eliminate the denominator on the left hand side.
Multiply both sides by 1+cos(2 x):
1-cos(2 x) = tan(x)^2 (1+cos(2 x))
Express the right hand side in terms of sine and cosine.
Write tangent as sine/cosine:
1-cos(2 x) = ( (sin(x))/(cos(x)) ^2 ) (1+cos(2 x))
Simplify the right hand side.
(1+cos(2 x)) ((sin(x))/(cos(x)))^2 = ((1+cos(2 x)) sin(x)^2)/cos(x)^2:
1-cos(2 x) = (sin(x)^2 (1+cos(2 x)))/cos(x)^2
Eliminate the denominator on the right hand side.
Multiply both sides by cos(x)^2:
cos(x)^2 (1-cos(2 x)) = sin(x)^2 (1+cos(2 x))
Apply a power reduction formula to cos(x)^2.
cos(x)^2 = 1/2 (1+cos(2 x)):
(1+cos(2 x))/2 (1-cos(2 x)) = sin(x)^2 (1+cos(2 x))
Apply a power reduction formula to sin(x)^2.
sin(x)^2 = 1/2 (1-cos(2 x)):
((1-cos(2 x)) (1+cos(2 x)))/2 = (1-cos(2 x))/2 (1+cos(2 x))
Come to a conclusion.
The left hand side and right hand side are identical

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how to remember all the trigonometric formulas any tips

September 10, 2013 11:02:52ammech Wrote:  how to remember all the trigonometric formulas any tips

know the basics, all other problems come from the basics, if you don't know the first few identities you can't come up with those which are more complex.. love what you do and do what you want.
if you love somebody, consciously you try to know them more.
same goes with subjects, if you like the subject you will discover and learn more..

Elisha You seem really great at math that first post was impressive so wow great job

Wow u could be a great scientist in future well im not so great at math but i managed to pass math subject

Wow u could be a great scientist in future well im not so great at math but i managed to pass math subject

thank you guys, i'm just trying to help. and if you guys also need help you can count on me, i would try my best to solve anything. although i'm not as smart as you think..

Bumping up since there is somebody who needed help and wasn't able to help, sorry, I hope I should have seen your thread earlier.

what is mathematics?! lol :P

hmm are you completely done with calculus ill need help in derivatives Lol stuck :P

^^ Yay! I don't have a clue what calculus is! -.- Boo!
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I'm in 6th, so.. But I am a star student, I have straight A's and some people could use grammar instead. I'll most likely overpass math in the future, since it's my favorite subject.

well i hope grammar would be taught by somebody else in his/her thread..i'm sure some people need your help regarding that.

elishagrace, can you teach me about shifting numbers from left to right?
like if i have an equation
2y+7y-9/4=4/9
When I shift 9/4 to right, what will it become? Can you tell me about that so I can understand?