tan a=1 then verify 2sin a cos a =1
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idk but would like to help you if chinese or Korean k so I don't know this one but sure of next time
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Step-by-step explanation:
tan a=1
tan a= tan 45°
a=45°
2sin a cos a=1
2(1/√2)(1/√2)
=2(1/(√2)²)
=2(1/2)
=1
hence verfied
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