cos 60°×cos 30°+sin 60°×sin 30°
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Answer:
Step-by-step explanation: cos60 = 1/2 = sin30
cos30 = root3/2 =sin60
cos60xcos30 + sin60*sin30
=1/2*root3/2+root3/2*1/2
=root3/4+root34
=root3/2
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