sin(60+A)+sin(60-A)=√3cosA
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Step-by-step explanation:
L.H.S
Sin(60+A)+sin(60-A)
=sin60.cosA+cos60.sinA+sin60.cosA-cos60.sinA
=sin60.cosA+sin60.cosA
=2.sin60.cosA
=2×(root3)/2. cosA
=root3. cosA
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