Anyone there Please help me to solve the question
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Step-by-step explanation:in ΔABC
∠A=45
∠B=90
⇒∠C=45
⇒AB=BC
⇒SIN A=BC/AC
by pythagoras theorem
AC=√2 BC
⇒SIN A =1/√2
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Answer is in the attachment below.. :)
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