If a is equals to 30 verify that sin 2a is equal to 2 sin a cos a
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a=30
solving LHS
sin 2(30)=sin 60=
solving RHS
2 sin 30 cos 30=
2×1/(2^1÷2)×(3^1÷2)×1/2
solving LHS
sin 2(30)=sin 60=
solving RHS
2 sin 30 cos 30=
2×1/(2^1÷2)×(3^1÷2)×1/2
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