Plz help me with question 10
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Sin^2 85 can be written as cos^2 5 THATS IT use sin2a+cos2a=1
avadacrucio:
could you please explain me more
sin^2a +cos^a =1 so 5 and 85 will pair up to give 1 and 10and 80will pair up to give 1 and so on u will get 8 but sin^2 45 will remain which eill add up will cos counterpart to give another 1 and final ans. would be 9
Thanks a looot
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