Show/Prove and Exact Answers (1 Viewer)

[scardizzle]

I've never been sure about questions that start with Show/Prove that blah = blah
because in some instances you have to expand one side out and make it equal the other side just by using algebra while in other instances you have to use a diagram they've given etc. how do i know which is the case is their some rule of thumb?

Also if the question doesn't state to give an answer in exact value when do i have to give it? For instance i know that when integrating definite integrals it is implied you give exact values what are some other examples where giving the exact value is implied?

 

[khorne]

Exact values are generally implied in trig work, geometry etc. but if it doesn't say, then there is no restrications...It just makes working on multipart questions more accurate.

blah = blah...well, it's up to you. You should think, what information do they give on the diagram? Is it enough to prove something? I generally like to use algebra and the graph in these cases...

Of course, if it's something like, prove <ABC = <BCD then I would work with the graph more, but if it's some trig identity, I would use algebra

 

[Shadowdude]

Show is when you have something and you must equate it to something else, I think. For these questions at the end, you put "as required".

Prove is when you have a full equation, and you take ONE side and start with the line "LHS =" or "RHS =" and then you manipulate it until you have the other side. So your last line should be "LHS = RHS" or "RHS = LHS".

Exact answers to me means: surds.