i paid for a Mathway premium account to help me with this and it apparently can't. and they haven't replied to me about it either. so here are two examples of identities I have trouble verifying: (theta after every trig term in first one)
sin/ (1-cot)+ (cos)/ (1-tan) = (cos+sin)
sin (u+v)/ sin (u-v)= (tan (u)+ tan (v))/(tan (u)- tan (v))
Part of you problem maybe that notation is all wrong.Originally Posted by CoffeeBird
Bothare wrong. It should be
.
We do not writebut we write
. You see cosine is a function so use function notation.
}{1-\tan(x)}=\frac{\sin(x)}{1-\frac{\sin(x)}{\cos(x)}}=\frac{\cos(x)\sin(x)}{ \cos(x) -\sin(x)})
@highvoltage
If you read reply #2, you will see that usinginstead of
creates problems.
If you want to use any computer algebra system you will get an error message.
Cosine is a function, so the CAS expects you to use function notation.
So it is.)
i should have specified, but i have been typing it in that way into the program. with the parentheses i mean. on mathway, i have made sure that i type everything as they show on their examples, and the server also tells me that it is correct but "cannot be answered automatically at this time". it does that for every single identity i type into it, and it says it has sent the problem to the developers but i haven't received a response ever. so, basically, i got ripped off.
still trying to figure out how you got from step 2 to step 3 on the first one, but the second problem makes perfect sense now. thank you for posting the notes! : )
Do you mean the step of putting the numerators over one, and then combining like terms in the denominators or the one after?
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2Thanks
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