I'm having some more difficulties with these two.
This one is I'm supposed to find the solutions in interval
This is what I've done so far but I'm unsure how to continue:
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For the second problem
It is determining if its a identity
I began it like this:
good so far: now, multiply by 2 and bring everything to one side. we get:
now notice that we have a quadratic equation in
to see this, let , then we have
do you see ow to proceed? solve for , and then you can solve for
yes, though you wrote it out weird. it makes me wonder if you actually know how to prove an identity or you're just rewriting the equation with the left side changed. proceed thusly,For the second problem
It is determining if its a identity
I began it like this:
Consider the left hand side:
thus we have shown , and so we have proven the identity.
EDIT: argh! this is the second time i've been beaten today by less than a minute