# Ti-nspire cas trig equations

• May 17th 2012, 11:34 AM
noork85
Ti-nspire cas trig equations
How do i solve trig equations on this? And also factoring.

It seems the calc doesnt recignie cos^2_x keeps saying missing (

I want to factor and solve for x by putting in cot x cos^2x-2cot x

How do i put it in?

Thanks!
• May 17th 2012, 01:33 PM
Plato
Re: Ti-nspire cas trig equations
Quote:

Originally Posted by noork85
How do i solve trig equations on this? And also factoring.

It seems the calc doesnt recignie cos^2_x keeps saying missing (

I want to factor and solve for x by putting in cot x cos^2x-2cot x

With most CAS $cos^2(x)$ is written as $[cos(x)]^2.$
• May 17th 2012, 02:00 PM
noork85
Re: Ti-nspire cas trig equations
Thank u so much!

Also, how would i graph if im given,

Vertex (4,-1); point (2,3)

I know how to graph but smetimes i messup with signs and i screw up the whole graph.
• May 17th 2012, 02:33 PM
skeeter
Re: Ti-nspire cas trig equations
Quote:

Originally Posted by noork85
Thank u so much!

Also, how would i graph if im given,

Vertex (4,-1); point (2,3)

I know how to graph but smetimes i messup with signs and i screw up the whole graph.

is the graph a parabola?
• May 17th 2012, 02:35 PM
noork85
Re: Ti-nspire cas trig equations
Yes.
• May 17th 2012, 02:46 PM
skeeter
Re: Ti-nspire cas trig equations
you should be familiar with the vertex form of a parabola ...

$y = a(x-h)^2 + k$

sub in the given vertex coordinates $(h,k)$ and the coordinates of the given point $(x,y)$ ... solve for $a$ , then graph.

btw ... next time state what you are graphing. if you had not mentioned a vertex, I would've had no idea what you wanted graphed in the first place.
• May 17th 2012, 02:48 PM
noork85
Re: Ti-nspire cas trig equations
Yes, i realized that, sorry.

I know how to graph on paper, i just wanted to know how to graph on the calc so i can verify my ans.

Thanks.
• May 17th 2012, 03:00 PM
skeeter
Re: Ti-nspire cas trig equations
Quote:

Originally Posted by noork85
Yes, i realized that, sorry.

I know how to graph on paper, i just wanted to know how to graph on the calc so i can verify my ans.

Thanks.

have you taken a look at the owner's manual?
• May 17th 2012, 03:08 PM
noork85
Re: Ti-nspire cas trig equations
Yes, and its all very confusing.
• May 17th 2012, 03:08 PM
noork85
Re: Ti-nspire cas trig equations
Do u have a ti-nspire cas calc?
• May 17th 2012, 03:13 PM
skeeter
Re: Ti-nspire cas trig equations
no