log ab = log a + log b
2 sin x * cos x = sin 2x
sin 30 = 1/2
log(2) sin15 + log(2) cos15 = log(2) sin15 * cos15 = log(2) sin30 /2 = log (2) 1/4 = log(2) 2^-2 = -2
log ab = log a + log b
2 sin x * cos x = sin 2x
sin 30 = 1/2
log(2) sin15 + log(2) cos15 = log(2) sin15 * cos15 = log(2) sin30 /2 = log (2) 1/4 = log(2) 2^-2 = -2