(m+2) sin theta +(2m-1) cos theta= 2m+1, if
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from trigonometric table sin0=0 and cos0=1
Given:(m+2)sin theta+(2m+1)cos theta=2m+1
(m+2)sin0+(2m+1)cos 0=2m+1
0+(2m+1)= (2m+1)
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