Question about Texas Instruments TI-36 X Solar Calculator

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Cosec Function I do not kow how to use Cosec with my Calculator. CosecLx(latitude desired) = Cosec Lv(latitude of Vertex) x Sec Dvx (distance of the vertex) Cosec Lx = Cosec 37.593 x Sec 10 degrees I got it worked out with a program. My question is how to use the functions on my TI-36X. Cosec??? and Sec???

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  • Anchorman Oct 04, 2007

    Thank you. I found a different way to do it. Well an easier way.

  • Anonymous Mar 02, 2009

    where do i find cosec on da calculator i need to solve -3 cosec cubed ( pie / 2) all divided by 4



1 Answer

Cosec = 1/sin and sec = 1/cos

Posted on Oct 04, 2007


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Tan^2 x+cot^2 x+2=sec^2 x*cosec^2 x

I worked out the algebra leaving out a few simple steps (special binomial products, Pythagorean theorem in trigonometry, definition of secant and co-secant functions). I am inserting the answer as a set of png pictures. However I am not sure how it will look.8c13afc0-98a7-4631-8a29-72f9b214beca.png31df2f2a-e4fb-483b-966b-62e1c37f3aba.png6dcb19e7-ac91-4dc6-849a-6d34f365ae20.png

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How do you calculate sec174?

SEC, CSC & COT are the INVERSE of COS, SIN & TAN and are usually require hitting the "2nd F" or "Func" key of the calc to make:

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Jan 22, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

How do i enter sec^-1(1.85)

You cannot enter it on the calculator but you can use the relation arcsec(z) =arccos(1/z)
On your calculator arccos is represented as cos^-1.
Here is a screen capture from a calculator that has the function. The arcos is computed along with the arcsec for angles in radians (top 2 lines) and in degrees (bottom two lines).


Sep 09, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer


The cosecant function is defined by
cosec(x) = 1/sin(x)

1[/] [sin] x.
Do not confuse this function with the arcsine function which is accessed by [2nd][sin to the -1]. When you use trigonometric functions make sure that the angle unit (Rad, dgree, grad) is the one you want.

Hope it helps.

Sep 18, 2009 | Texas Instruments TI-30XA Calculator

1 Answer


I shall attempt :D
1) cosec A + cot A = 3
we know that (cot A)^2 + 1 = (cosec A)^2
Hence, (cosec A)^2 - (cot A)^2 = 1
thus, (cosec A + cot A) (cosec A - cot A) = 1
3 (cosec A - cot A) = 1
(cosec A - cot A) = 1/3

(cosec A - cot A) = 1/3
(cosec A + cot A) = 3
Summing them, 2 cosec A = 3 1/3
cosec A = 6 2/3 = 5/3
sin A = 0.15
Thus, cos A = sqrt (1 - (sin A)^2) = 0.989

2) Prove that (1+tan x - sec x)(1 + cot x + cosec x) =2
LHS= 1 + cot x + cosec x + tan x + 1 + tan x cosec x - sec x - sec x cot x - sec x cosec x
We can calculate that
tan x cosec x = sec x (since tan x = sin x / cos x)
sec x cot x = cosec x
so the above is
LHS = 1 + cot x + cosec x + tan x + 1 + sec x - sec x - cosec x - sec x cosec x
LHS = 2 + cot x + tan x - sec x cosec x
LHS = 2 + cos x / sin x + sin x / cos x - 1 / (sin x cos x)
LHS = 2 + [{cos x}^2 + {sin x}^2 - 1] / (sin x cos x)
LHS = 2 (proved)

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arc(function) = function^-1, calculated in the first quadrant for simplicity(0-pi/2) (0-90deg), as all functions repeat circularly
just another method of notation

Jun 19, 2008 | Texas Instruments TI-84 Plus Silver...

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