Question about Super Tutor Trigonometry (ESDTRIG) for PC
Sec^4X- sec^2X = 1/cot^4X + 1/cot^2X
RHS
1/cot^4X + 1/cot^2X
=1/(Cos^4X/Sin^4X) + 1/(Cos^2X/Sin^2X)
=Sin^4X/Cos^4X + Sin^2X/Cos^2X
=Sin^4X/Cos^4X + Cos^2X.Sin^2X/Cos^4X
=Sin^2X/Cos^4(Sin^2X + Cos^2X)
=Sin^2X/Cos^4X
=(1-Cos^2X)/Cos^4X
=1/Cos^4X - Cos^2X/Cos^4X
=1/Cos^4X - 1/Cos^2X
=Sec^4X - Sec^2X
=LHS
Posted on Mar 15, 2009
Zulfikar Ali
ali_zulfikar@yahoo.com
9899780221
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Posted on Jan 02, 2017
Dec 11, 2014 | Computers & Internet
Jul 12, 2014 | Super Tutor Trigonometry (ESDTRIG) for PC
Feb 02, 2014 | SoftMath Algebrator - Algebra Homework...
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
cos x
cosec x = 1
sin x
cot x = 1 = cos x
tan x sin x
Good luck!
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