Question

I'm doing Trigonometry in my Geometry class and I'm unsure how to get regular Sin, Cos, And Tan to work on my calculator, I can do the intervals on it. My calculator is (Texas Instruments TI-30XA) Can someone help me find out how to get it to work on my calculator? I know how to do most of the equations. the Tan one's kind of confuse me.

Answer 1

can you be a bit more precise about the problem? is the function itself not working at all, is it giving you the wrong result, etc?

have you tried resetting the memory?

Answer 2

My calculator when I try to type it into my calculator gives me a different answer than what the teacher gets when we are doing notes. I haven't tried resetting the memory yet, I'll try that

Answer 3

you are most likely not in the right mode

most scientific calculators are in radians by default but if you are working with degrees you need to switch

now, I don't know this model off the top of my head but you should be able to find an online manual

Answer 4

Alright, currently my calculator is in Deg mode

Answer 5

can you try inputting cos(90) now? you should get 0

Answer 6

if not there's something wrong w/ your calculator

Answer 7

I imputed that and got 0

Answer 8

perfect, you should be good to go

Answer 9

Alright. Thank you

Answer 10

In my notes \[\frac{ 7 }{\tan 46 }\] Is the equation and If I type that into my calculator I get 7.2 and in my notes it says X=6.8. I typed 46 then tan times 7

Answer 11

in order to evaluate this you need to type 7, then divide, then tan, then parentheses around 46

7/tan(46)

Answer 12

it might also automatically supply parentheses for you

Answer 13

the angle you want to evaluate always goes right after the cos/tan/etc. function

Answer 14

It gives me 0.152 when I type that

Answer 15

oof I don't really know how to explain this

press 7, then press the divide button, then tan, then parentheses around 46, then enter

Answer 16

try this?

7/(tan(46))?

Answer 17

It still gives me 0.152. At one point I somehow got 336.

Answer 18

gonna try something a bit different

press 7 then the enter key
then the divide key
then tan, then open parentheses, then 46, then closed parentheses)

Answer 19

if that doesn't work then idk what's wrong

Answer 20

I got the same thing. My calculator is one of the older ones. Maybe I could find some tutorials?

Answer 21

It looks like this

Answer 22

alright I actually think I might know what's up, yours might be one of the ones where you put the angle first and then tan

Answer 23

46, then tan, then the invert function button (it might look like 1/x or f^-1) then multiply by 7?

Answer 24

That worked. Thank you for helping me figure this out