spam=report from 3 accounts
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Step-by-step explanation:
=√(0-asin60°)²+(acos30°-0)²
=√a²(√3/2)²+a²(√3/2)²
=√3a²/4+3a²/4
=√2(3a²/4)
=√3a²/2
=a√3/2
option b
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