X COS 50 X COS
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Step-by-step explanation:
cos50x−sin50x=1 or cos50x=1+sin50x
L.H.S.≤1 and R.H.S.≥1
Hence, we must have cos50x=1+sin50x=1 or sinx=0 or x=nπ
I hope this will help you
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