Question

(sec² A -1)cos²A =1 prove LHS=RHS​

Answer 1

Step-by-step explanation:

LHS : (sec^2 A -1)cos ^2A

we know that sec^2A-1 = tan^2A

so, tan^2A * cos^A

= 1/cos ^2A * cos^2A

=. 1. ( RHS )

hence LHS = RHS