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Ecellent notes & formulas in trignometry must see it

Awaiting Review for Nickels

Tagged with: trigonometry academic

posted on 6 Oct 2007 19:59:44 IST

Trigonometric Identities:

Trigonometry Identities, Mathematics Formulae, Eformulae.com

Pythagorean Identities:

Sum / Difference Formulas

Sum Difference Formulae, Mathematics Formulae, Eformulae.com

Rules of Sign

Quadrant	sin	cos	tan
	cosec	sec	cot

I	+	+	+
II	+	-	-
III	-	-	+
IV	-	+	-

Reduction Formulae

Angle/Function	sin	cos	tan
-?	-sin ?	cos ?	-tan ?
90°- ?	cos ?	sin ?	cot ?
90°+ ?	cos ?	-sin ?	-cot ?
180°- ?	sin ?	-cos ?	-tan ?
180°+ ?	-sin ?	-cos ?	tan ?
270°+ ?	-cos ?	-sin ?	cot ?
270°+ ?	-cos ?	sin ?	-cot ?
360°+ ?	-sin ?	cos ?	-tan ?

Half Angle

Double Angle

Co-function Identities

Negative Angle Identities

Power Reducing

Sum To Product

Product To Sum

Other Trigonometry Identities

Friends hope u found this article useful please do comment & rate on this article if found useful

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rakesh61 (1884)

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this article: 86 points (with 16 Olaaa!! Perrrfect answer.

in 19 votes ) [?]

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comment by rakesh61 (posted on 6 Oct 2007 22:11:23 IST)

why only rates no comments , please do post ur precious comments too

comment by Eshaan573 (posted on 6 Oct 2007 22:20:20 IST)

No Great job.All The Above Formulas are available in any standard textbook for 12th.You needed those nickels very badly!

comment by ramyani (posted on 6 Oct 2007 23:31:03 IST)

nice.

comment by ayush007 (posted on 9 Oct 2007 17:08:21 IST)

well..i would say...a good pack of formulaes...
few part of the post is well...appreciative...like the way you have represented the sin, cos and tan...in begnning for better rememberance..
it would be much better if you provide the process of arriving to the results and few reasonings......
it would be helpful if its self written and proved than to copy-paste...
like ....
how would you represent..
tan (a+b) formula...in (hieght/base) form?? think...

well ...make the posts more innovative..its really useful..

comment by ayush007 (posted on 9 Oct 2007 17:08:51 IST)

oh...one more thing...

KEEP SMILING...........