Question

cot A - 1 / 2 - sec² A = cot A / 1 + tanA ​

Answer 1

Step-by-step explanation:

Notice,

LHS=cotA−12−sec2A

=1tanA−12−(1+tan2A)

=1−tanAtanA1−tan2A

=1−tanAtanA(1−tan2A)

=1−tanAtanA(1−tanA)(1+tanA)

=1tanA(1+tanA)

=cotA1+tanA

=RHS

Answer 2

Answer:

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