How do you evaluate #arctan(-1)# without a calculator?
#x=arctan(-1)#
#tanx=-1#
Think of where on the unit circle is tangent of some angle equal to -1.
#x=(-pi)/4+pin#
#x=arctan(-1)#
#tanx=-1#
Think of where on the unit circle is tangent of some angle equal to -1.
#x=(-pi)/4+pin#