Question

how to solve it and any short trick​

Answer 1

Answer:

no short tricks do it without them

Answer 2

Step-by-step explanation:

tan∅=1+tan²∅ --------(1)

tan∅=sec²∅ ---------------(1+tan²∅=sec²∅)

Therefore,

sec²∅ - sec⁴∅= tan∅ - tan²∅

= 1+tan²∅ - tan²∅ -------(from (1))

=1

This is the best short answer for this question.

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Hopefully I think this will help you!!!