-3.14159
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probobly because pi equals 3.14 and you can make 3.14 negative so yes you can have negative pi
A = pi * r^2 divide A by pi A/pi = r^2 take square root each side and discard the negative answer sqrt(A/pi) = r
Negative pi is - 3.14.
In the domain [0, 2*pi],sin is negative for pi < x < 2*picos is negative pi/2 < x < 3*pi/2 andtan is negative for pi/2 < x < pi and 3*pi/2 < x < pi.Also, the same applies for all intervals obtained by adding any integer multiple of 2*pi to the bounds.
positive times negative equals negative. positive times positive equals positive. negative times negative equals positive