f sinA -cosA=0 , then find the value of (sin4A + cos4A)
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Answered by
1
since sina-cosa=0
sina=cosa
a=π/4
(in first quadrant)
value of sin4a+cos4a
sin4(π/4)+cos4(π/4)
=sinπ+cosπ
=0-1=-1
sina=cosa
a=π/4
(in first quadrant)
value of sin4a+cos4a
sin4(π/4)+cos4(π/4)
=sinπ+cosπ
=0-1=-1
Answered by
1
-1 is a right ans in this question
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