# TI-83 Equation Solver help?

Ok so i have a math final coming up and i was wondering what is wrong with my equation solver
We've been studying projectiles and i have this equation
0=(D * tan(a) -4.9 * D^2 / V^2 / cos(a) ) ^2
this then shows
D=
A=
V=
from there you can put values into d,a,and v to solve for one another....
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Ok so i have a math final coming up and i was wondering what is wrong with my equation solver

We've been studying projectiles and i have this equation

0=(D * tan(a) -4.9 * D^2 / V^2 / cos(a) ) ^2

this then shows

D=

A=

V=

from there you can put values into d,a,and v to solve for one another.

Each time i have attempted i have been giving this message:

ERR : NO SIGN CHNG

i am just wondering if i put the equation in wrong or whats going on

thanks for your help

We've been studying projectiles and i have this equation

0=(D * tan(a) -4.9 * D^2 / V^2 / cos(a) ) ^2

this then shows

D=

A=

V=

from there you can put values into d,a,and v to solve for one another.

Each time i have attempted i have been giving this message:

ERR : NO SIGN CHNG

i am just wondering if i put the equation in wrong or whats going on

thanks for your help

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