Find exactly: sin 30˚ cos 45˚?

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Find exactly: sin 30˚ cos 45˚

2007-01-08 16:01:56 · 4 answers · asked by thomasgraham880 1 in Science & Mathematics ➔ Mathematics

sin(30°) = sin(pi/6) = 1/2
cos(45°) = cos(pi/4) = sqrt(2)/2
=>
sin(30°)cos(45°) = (1/2) (sqrt(2)/2) = sqrt(2)/4.

2007-01-08 17:14:14 · answer #1 · answered by tablecloth 1 · 0⤊ 0⤋

sin 30=1/2 cos 45= Square root of 2/2

2016-05-22 21:54:45 · answer #2 · answered by Anonymous · 0⤊ 0⤋

sin(30) = sin(pi/6) = 1/2
cos(45) = cos(pi/4) = sqrt(2)/2

Therefore,

sin(30)cos(45) = (1/2) (sqrt(2)/2) = sqrt(2)/4

2007-01-08 16:08:12 · answer #3 · answered by Puggy 7 · 4⤊ 0⤋

sin30=1/2
cos45=(sqrt2)/2
(1/2)*((sqrt2)/2)=(sqrt2)/4

2007-01-08 16:09:07 · answer #4 · answered by Nick R 4 · 1⤊ 0⤋