sec²A - sin²A - 2sin⁴A / 2cos⁴A- cos²A = 1.
prove it...
please answer my question .
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Answer:
Sin²A + Cos²A = 1
Step-by-step explanation:
= Sec²A - {Sin²A(Cos2A)/Cos²A(Cos2A) }
{ Cos2A = (2Cos²A - 1) = (1 - 2Sin²A) }
= Sec²A - (Sin²A/Cos²A)
= Sec²A - tan²A
= 1 + tan²A - tan²A
=
Hence proof
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