can u help me solve this question
If xcos θ + y sinθ = a cos 2θ and;
xsinθ - ycos θ = 2a sin 2θ
prove that (x+y)2/3 + (x-y)2/3 = 2a2/3
Hello, calculus_jy!
This is The Problem from Hell . . . (coming to a theater near you)
Multiply [1] byIf .
prove that: .
Multiply [2] by
Add: .
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In a similar fashion solve for
We have: .
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We have: .
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Then: .
Add [3] and [4]:
. .
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. . . . . . . . . . . . . .
Therefore: . . . . . ta-DAA!!
i really appreciate ur help, and u said it is a problem from hell, just wondering how u manage to start solving problems lyk this, besides practicing and using ur brain, can u offer me few tips??
Also i hav 2 other problems from hell, i will post it in the geometry section and wonder if u can help me with them, they took me ages!