Hi I have a few questions in can't get the right answers: 1)Simply the expression 2)Simply the expression This is what i have done: = = what should i do next? 3)if tanx=-4,x [ ] find: sec(x) P.S
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Originally Posted by Paymemoney Hi I have a few questions in can't get the right answers: 1)Simply the expression Note that this is the difference of squares. 2)Simply the expression Factor out a tanx, then note that (tan^2x+1)=sec^2x. What you have done is unneccesary. This is what i have done: = = what should i do next? 3)if tanx=-4,x [ ] find: sec(x) P.S .
Originally Posted by Paymemoney Hi I have a few questions in can't get the right answers: 1)Simply the expression You can begin by saying Now you can apply some identities for sin and cos all squared.
Originally Posted by VonNemo19 1)Simply the expression Note that this is the difference of squares. How so?
Originally Posted by Paymemoney Hi I have a few questions in can't get the right answers: 1)Simply the expression 2)Simply the expression This is what i have done: = = what should i do next? 3)if tanx=-4,x [ ] find: sec(x) P.S 1) . 2) 3) . Since is in the fourth quadrant, and so . Therefore .
Originally Posted by Paymemoney Hi I have a few questions in can't get the right answers: 1)Simply the expression 2)Simply the expression This is what i have done: = = what should i do next? 3)if tanx=-4,x [ ] find: sec(x) P.S 1)
Last edited by bigwave; Jan 10th 2010 at 10:27 PM. Reason: wrong sign
Originally Posted by pickslides How so? Let and We then have . Your way of doing things was equally valid. It looks as though prove it has combined our efforts.
Originally Posted by Prove It 3) . Since is in the fourth quadrant, and so . Therefore . just to clarify what your doing is working backwards to find out sec(x)?
He is using the fact that
can someone explained to me how do you get when you find cos(x) from tan(x)=-4.I understand that you get then but where does the 17 come from?
Originally Posted by Paymemoney can someone explained to me how do you get when you find cos(x) from tan(x)=-4.I understand that you get then but where does the 17 come from? don't worry i undertsand how they got it, but why do you have to simply down to
1) . Hey, shouldn't that be ?
Originally Posted by bandedkrait Hey, shouldn't that be ? It seems so Table of Trigonometric Identities
Originally Posted by Paymemoney don't worry i undertsand how they got it, but why do you have to simply down to
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