The sum of the series
sinθ + sin(((n − 4)/(n − 2)))θ + sin(((n − 6)/(n − 2)))θ + ... n terms
is equal to
(1) sin(((nθ)/(2 − n)))
(2) cos(((2nθ)/(2 − n)))
(3) tannθ
(4) cotnθ
Let f : R − {(3/5)} → R be defined by
f(x) = ((3x + 2)/(5x − 3)) . Then,
(a) f^(−1) (x) = x
(b) f^(−1) (x) = −f(x)
(c) fof(x) = −x
(d) f^(−1) (x) = (1/(19))f(x)
A motor boat going downstream
overcomes a float at a point A. 60 minutes
later it turns and after some time passes
the float at a distance of 12 km from
the point A. Find the velocity of the stream
(assuming constant velocity for the
boat in still water)
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