If x sin3|+ y cos3|=sin|cos| and xsin|=ycos|, prove x2+y2=1.
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3
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sorry this has been a final place to get to the part in the singing competition
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please write in hindi sorry
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Here is ur answer dear:-
=> xsin³theta + ycos³theta= sintheta×costheta.
=> x.sin³theta + cos²theta.(ycostheta) = sintheta.costheta.
• [use xsintheta= ycostheta in above]
=> xsin³theta+ cos²theta× xsintheta= sintheta×costheta.
=> xsintheta( sin²theta + cos²theta) = sintheta×costheta.
=> xsintheta = sintheta×costheta.
=> x = costheta.
=> so, y = sintheta.
Hope it is correct
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