how do I use cosecant/secant/cotangent on my calculator?

Question

My calculator model is TI-30X IIS and I need to find the Csc/Cot/Sec.
Above the normal sin, cos, and tan buttons, it says sin-1 cos-1 and tan-1; I'm assuming that these are the buttons i need to press. But when I type in
100sin-1(60) ; it comes out as DOMAIN error.
what do I do?

Answer 1

You do NOT want to use sin-1 cos-1 and tan-1 . Those are inverse functions, not reciprocal function. sin-1 tells the calculator to find the angle whose sine is whatever. No angle has a sine of 60, which is why you have a domain error.

To find the cosecant, use 1/sin( ).

To find the secant, use 1/cot( ).

To find the cotangent, use 1/tan( )

So to find 100csc(60º) type in 100/sin(60º).

Answer 2

Cosecant Secant Cotangent

Answer 3

You are assuming incorrectly. Those are NOT the buttons you need to press. It is likely that your calculator does not have a one-step button for such rarely-used functions as CSC, SEC, and COT. However, "Sin-1" is "the angle whose sine is." It is entirely different from the inverse trig function CSC.

Remember, sin = opp/hyp. CSC= hyp/opp. Draw out a right triangle and go back to the basics to be sure you understand them!!

To get CSC, you take the sine of the argument, then take the result and 1/x it !! CSC=1/sin.

Totally different interpretation than sin-1. Your calculator's "sin-1" DOES NOT mean ""sine" to the minus-one power," it means "the angle whose sine is...!!"

Same with cos. Cos = adj/hyp. SEC= hyp/adj. SEC= 1/cos.

To get SEC, take the cosine, then take the result, hit the "one over x" key (I'm assuming the calculator has one), and you have that!

The angle whose sine is 60 is in fact meaningless, since sine is always between zero and one inclusive. Your calculator is functioning as it ought to, when it gives you an error message for putting 60 in as an argument for "sin-1." There is no such angle whose sine is 60.

Cotangent: take the tangent, and hit 1 / X . COT= adj/opp=1/tan.

Hope that helped!

Answer 4

Csc/Cot/Sec are all 1/sin 1/tan 1/cos. Figure out what the sin or cosine is then push the x^-1 button. sin-1 isn't the same as csc

Answer 5

These are the buttons you need. You should type in 60, press the sin-1 button and then multiply by 100.

Answer 6

well, for a calulator, sin-1 stands for arcsin, but not 1/sin.
so if you need to calculate cosecant, you have to press sin, and then press 1, /, your answer, =. that is how u get cosecant.

Answer 7

sin-1 is arcsin,

1/tan is cot
1/cos is sec
1/csc is sin

tan-1 does not equal cot

Answer 8

well as for me i hade to get back to my calcualters manual if you cant find it try this site it may help not sure thou
hope it dose :)

any way it says that you have to
Press [SIN] 31.67 [ ) ] [x-1], and press [=] to solve.

but bee sure its on the Degree form by pressing DEG

Answer 9

That's a good question!

Answer 10

hit ( , then 1/x , then sin , then ) , then continue with the rest.