please answer this question with clear solution ?????????
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Step-by-step explanation:
sin^2(90-5) - cos^2 75
sin^2 75 - cos ^2 75
(1-cos^2 75) - cos ^2 75
-cos^2 75 +(1-1/cos^2 75)
- cos^2 75 - sin^2 75
=1
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