Question about Super Tutor Trigonometry (ESDTRIG) for PC
Posted on Sep 02, 2008
Posted on Aug 12, 2008
How to determine the area of a triagle abc, if a=110mm, b=80mm and c=120degrees
Posted on Jul 16, 2008
Change csc to 1/sin. Find a common denominator and add the two left terms.
1/sin - sin = (1 -sin^2)/sin. Rewrite formula
(1 - sin^2)/sin = cos^2/sin Divide out the /sin.
1 - sin^2 = cos^2 Rearange.
1 = cos^2 + sin^2 Yes, that's true. It's like the Pythagorean formula.
Posted on Jun 13, 2008
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Posted on Jan 02, 2017
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Dec 07, 2013 | Casio ClassPad 300 Calculator
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:
SIN button work as COSEC,
COS button work as SEC
TAN button work as COT
Formulas are below:
sec x = 1
cosec x = 1
cot x = 1 = cos x
tan x sin x
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