Math, asked by Anshik3482, 10 months ago

Sin²a - sin²a.sin²b - sin²b + sin²a.sin²b }/cos²a.cos²b how it came

Answers

Answered by khairunnisa61

1

Step-by-step explanation:

(sin²a-sin²b)/ cos²a.cos²b

sin²a/(cos²a.cos²b) - sin²b/(cos²a.cos²b)

we know , sina/ cosa = tana

and 1/cosa = seca

=tan²a.sec²b - tan²b.sec²b

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