Thanks for answering, everyone.
zoki85, that is very neatly done. Turns out we didn't need the cosine rule at all.
Filip Larsen, yes it is established that tan (45 - θ) = x / ( x + y ). But after expansion, we are left with (1 - tan θ) / (1 + tan θ ) using this formula...
If you have an...
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It's supposed to be a simple problem. But I can't for the life of me figure out how to go about it. I managed to find out cos θ using the cosine rule, but it is a very long expression and...
Homework Statement
I have to prove that:
(sinθ/(1-cotθ)) + (cosθ/(1-tanθ)) = cosθ + sinθ
Homework Equations
The Attempt at a Solution
Here's my attempt at solution...