1 + tan^2 (5) - csc^2 (85) = ?

Would this equal 0

could someone explain this to me and the correct answer?

1 answer

Correct, assuming you work in degrees,
1+tan²(5°)-csc²(85°)
=1+tan²(5°)-sec²(90-85°)
=sec²(5°)-sec²(5°)
=0
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