Mathematics, 25.10.2020 15:50 thelukp7fihp

Prove that: ( sec 4A - 1 ) / ( sec 2A - 1 )

=

tan 4A . cot A

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Prove that: ( sec 4A - 1 ) / ( sec 2A - 1 )

=

tan 4A . cot A

P...