Question

Prove that :-
___________
$(secθ+cosθ)(secθ-cosθ) = { \tan}^{2} θ + { \sin }^{2} θ$
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Answer 1

Step-by-step explanation:

(sec©+cos©)(sec©-cos©)

use

(a+b) (a-b) =a²-b²

so we get

(sec²©-cos²©)

(tan²©+1-cos²©)

(tan²©+sin²©)

we know

sin²©+cos²©=1

hope u understand

mark as brilliant

Answer 2

Answer:

Hope this will help you.