You can put this solution on YOUR website! What is the exact value of sin(-195)?
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In a unit circle rotating 195º clockwise gives you a reference angle of 15º in quadrant II where sin>0
use sin addition formula to solve:
sin(15º)
=sin(45-30)
=sin45cos30-cos45sin30
=√2/2*√3/2-√2/2*1/2
=√6/4-√2/4
=(√6-√2)/4
(