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March 3, 2015

March 3, 2015

Posted by **Patricia** on Sunday, May 1, 2011 at 8:52am.

- calculus -
**Damon**, Sunday, May 1, 2011 at 9:49amcotan 45 = 1

d cotan/dx = -csc^2 x

d cotan = -csc^2 x dx

here

csc^2 45 = (2/sqrt2)^2 = 4/2 = 2

dx = -1 deg * pi radians/180 deg = -.01745

and

y(x+dx) = y(x) + dy/dx * dx

so

cotan(44)= cotan (45) - 2(-.01745))

= 1 + .035

=1.035

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