If sin2A=tan245 where A is an acute angle then the value of A is

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1. Answer:

   90

   Step-by-step explanation:

   sin²A = tan²45

   we know tan 45 =1

   so tan²45 =(1)² = 1

   => sin²A = 1

   Now we know that sin90 = 1

   => sin²90 = 1

   #=> sin²A = sin²90

   ◇ A = 90

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