Prove that:
( sec 4A - 1 ) / ( sec 2A - 1 )
=
tan 4A . cot A
P...
Mathematics, 25.10.2020 17:10 vbodbodlhviprw2954
Prove that:
( sec 4A - 1 ) / ( sec 2A - 1 )
=
tan 4A . cot A
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