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how do you get sine 150 as 1/2? and also, how what about sine 70?

2007-07-15 00:40:02 · 3 answers · asked by lester 1 in Science & Mathematics ➔ Mathematics

Sin 150 = Sin (180 - 30) = Sin 30 = 1/2

Sin 70 is not a proper fraction. Its value is 0.939692621...

2007-07-15 01:38:46 · answer #1 · answered by Swamy 7 · 0⤊ 0⤋

sine of the difference between 180 and150.

2007-07-15 00:50:30 · answer #2 · answered by Anonymous · 0⤊ 0⤋

It's very simple.
sine150= sine(90+60)
=cos60
=1/2
I don't know the answer for sine70 Sorry.

2007-07-15 00:52:06 · answer #3 · answered by Sivaraj AP 1 · 0⤊ 0⤋