Sin 60 cos 30 sin 30 cos 60
Asked by admin @ in Math viewed by 275 People
Sin60.cos30+sin30.cos60
Answered by admin @
Sin60*cos(90-60)+sin30.cos(90-30)
Sin60*sin60+sin30*sin30
Sin²60+sin²30
{√3/2}² + (1/2)²
3/4+1/4
(3+1)/4
4/4
= 1
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