mathsurgently needed
posted by Anonymous .
range of
sin(siny) +cos(siny)

sin y can take on values between 1 and 1.
For any value of siny between 1 and 1, the range of
sin(siny) + cosine(siny) is between
sqrt2 and +sqrt2.
Extreme values of sin(siny) + cos(siny) occur where sin(siny) = cos(siny)
siny = +or (sqrt2)/2
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