sin 60 cos 30 + sin 30 cos 30
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sin 60cos30 + sin30cos30
= sin60(cos(90-30)) + sin 30( cos( 90-60))
sin60cos60 + sin30 cos30
sin 60*1/sin60 ( sin thitha is reciprocal of cos thita and vice versa)
+ sin30*1/30
=1 + 1
= 2
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