the value of 2sin45
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2(sin45°) (cos45°)
:•sin45° = 1/√2
cos45° = 1/√2
2(1/√2) (1/√2)
2(1/2)
2
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= 2×1/√2×1/√2
= 2/√2×1/√2
=2/2=1
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