=\frac{%CF%80}{4}&line2=\mathrm{Solution:\:}x=1 "arctan(x)= pi/4")
arctan(x)= pi/4
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&line2=\mathrm{Solution:\:}0.66577%E2%80%A6 "arctan(pi/4)")
arctan(pi/4)
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&line2=\mathrm{Solution\:is\:}-\arctan(\frac{%CF%80}{4}) "arctan(-pi/4)")
arctan(-pi/4)
I love maths - arctan(1/3)+arctan(1/2)=arctan1...As the total angle made by green and blue angle is nothing but an angle created by diagonal of a square (which is π/4). | Facebook
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Column Why does π/4= arctangent 1=4 arctangent (1/5)- arctangent (1/239) hold true? | Japanese Mathematics in the Edo Period
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)&line2=\mathrm{Solution:\:}\frac{%CF%80}{4} "arctan(tan((5pi)/4))")