1.

Sec²A - sin²A - 2sin⁴A / 2cos⁴A- cos²A = 1.prove it...please answer my question .

Answer»

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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