Q) Evaluate : (sec² 45⁰ – tan² 45⁰)/sin² 45⁰

Ans:

We know that: sec 45⁰ = , tan 45⁰ = 1, sin 45⁰ = ;

By submitting these values in the given expression, we get:

=

=

= 1 x 2 = 2

Hence the value of the given function is 2.

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