if tanA =√2 -1 show that SinA*CosA=√2/4
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Step-by-step explanation:
tan A +1 = √2
sec A =√2
sec A = sec 45°
A= 45°
sin A × cos A
= sin 45° × cos 45°
=1/√2 ×1/√2
= 2/4
=1/2
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