Help, a difficult problem
The problem is: Given that A and B are both acute angles, and A + B ≠ π/2, (1 + tan A)(1 + tan B) = 2, prove that A + B = π/4. Well, that's the problem. It needs to be solved using the 'analysis method', which is deducing the conditions from the conclusion. I couldn't find it on Baidu... Does anyone know how?
Replies (17)
I haven't studied this part about directly cutting with numbers and using a coordinate system at right angles...
Can you soar? Also, repeating what's said on the second floor, without a picture, what the hell are you talking about.
You don't need a diagram for this question on the 6th floor. I didn't attend evening study, but he did.
Alright… I'll be honest, I never really studied the evil triangle with trees. Since the second year of middle school, I almost never attended classes and mostly self-studied. I never studied it…
Oh my god, are you all junior high school underclassmen? tan is the tangent function, I'm in tears.. >-< I shouldn't have posted to ask
If anyone doesn't understand calculus, you can ask me. If you don't understand quantum mechanics or theoretical physics, you can also ask me. I have self-studied these subjects.
Don't ask me about limits; I can't figure them out myself. I'm very familiar with things like differentiation...
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