Question

if sin⁴A - cos⁴A = 1 and 0<A<_90° , then A= ?

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Answer 1

Step-by-step explanation:

sinA−cosA=0⇒A=cosA⇒tanA=1⇒A= 4

π

sin 4 A+cos 4 A=sin 44π +cos 44π =( 21 ) 4 +( 21 ) 4 = 41 + 4/1 =2/1

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