2007-04-12 23:08:03 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
To remember observe the following steps
Write 0 1 2 3 4
Divide by 4 0/4 1/4 2/4 3/4 4/4
Take sq.rt. gives the value of
Angles 0 30 60 90
sin 0 1/2 1/rt2 rt3/2 1
cos 1 rt3/2 1/rt2 1/2 0 reverse of sin
tan 0 1/rt3 1 rt.3 not defined
Here you many understand properly so write in proper columns.
Then remember only O A OA
Then sin = O/H i.e. opp.side/Hyptotenause
& cos = A/H i.e. adjacent side/Hypotanuse
& tan = O/A i.e Opposite side/ Adjacent side.
Then other functions you can write.
2007-04-13 14:24:31 · answer #1 · answered by Pranil 7 · 1⤊ 0⤋
http://www.teicontrols.com/notes/Trigonometry/Identities.pdf
www.sosmath.com/trig/Trig5/trig5/trig5.html
just type trigonometric ratios in google and you'll find thousands of other web pages...
2007-04-13 06:15:47 · answer #2 · answered by james 1 · 0⤊ 0⤋
Trigonometry Identies
en.wikipedia.org/wiki/Trigonometric_identity
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2007-04-13 07:47:57 · answer #3 · answered by SAMUEL D 7 · 0⤊ 0⤋