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sin x/2 = +- root [(1-cosx)/2]?

use the above formula to find sin(7.5)

2007-11-06 09:33:59 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

find sin(7.5)
use double angle formula
EXACT ANSWER

2007-11-06 09:57:00 · update #1

1 answers

sin(15/2) = sin7.5 = +/- root((1-cos15)/2)
= +/- root((1-.9659258263)/2) = +/- .1305261922

2007-11-06 09:43:13 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋

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