Prove:- arctan(1/4)+ arctan(1/9)= (1/2)arccos(3/5)

Now we prove Machin's formula using the tangent addition formula:tan(A+B)= tanA+tanB/1-tanAtanB. If A= arctan(120/119) and B=
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2. asked by alex
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Prove:-arctan(1/4)+ arctan(1/9)= (1/2)arccos(3/5)
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2. asked by Arpan
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The values of x that are solutions to the equation cos^(2)x=sin2x in the interval [0, pi] area. arctan(1/2) only b. arctan(1/2)
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2. asked by Carson
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4 arctan(1/3)+4 arctan(1/4)+4 arctan(2/9)=pihow do i prove it but without using this formula arctan(x)+arctan(y) = arctan(
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2. asked by math student
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arctan(tan(2pi/3)thanks. arctan(tan(2pi/3) = -pi/3 since arctan and tan are inverse operations, the solution would be 2pi/3 the
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2. asked by Jen
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Arrange these in order from least to greatest:arctan(-sqrt3), arctan 0, arctan(1/2) So far I got the first two values,
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2. asked by Anonymous
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also:integral of tan^(-1)y dy how is integration of parts used in that? You write: arctan(y)dy = d[y arctan(y)] - y d[arctan(y)]
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2. asked by marsha
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Let f be a function defined by f(x)= arctan x/2 + arctan x. the value of f'(0) is?It's 3/2 but I am not very clear on how to
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2. asked by Jamie
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sin(arctan(-4/3)okay so i made arctan(-4/3) = x so im solving for sin(x) and x= arctan(-4/3) so then tanx = -4/3 and now im
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2. asked by Billy NEED HELP
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Evaluatearctan(cot10Pi/9) sec(arccos(-1/6) csc(arcsec(5/3) sin(2 arccos(sqrt5/5)
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2. asked by Liv
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