tan^(-1)""2/11+cot^(-1)""24/7=tan^(-1)""...

`tan^(-1)""2/11+cot^(-1)""24/7=tan^(-1)""1/2`

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`cot^(-1)""24/7=tan^(-1)""7/24`

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sin^(-1)""3/5+cos^(-1)""12/13=cos^(-1)""33/65=sin^(-1)""56/65
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tan^(-1)""1/4+tan^(-1)""2/9=sin^(-1)""1/sqrt5
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tan^(-1)""2/11+cot^(-1)""24/7=tan^(-1)""1/2
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sin^(-1)""1/sqrt5+cot^(-1)3=pi/4
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"cosec"^(-1)sqrt5+cot^(-1)3=pi/4
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tan^(-1)""1/2+tan^(-1)""1/3=sin^(-1)""1/sqrt5+cot^(-1)3=pi/2
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tan^(-1)""3/4+tan^(-1)""3/5-tan^(-1)""8/19=pi/4
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2tan^(-1)""1/2+tan^(-1)""1/7=tan^(-1)""31/17
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2tan^(-1)""3/4-tan^(-1)""17/31=pi/4
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2sin^(-1)""3/5-tan^(-1)""17/31=pi/4
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2tan^(-1)""1/5+tan^(-1)""1/8=tan^(-1)""4/7
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सिद्ध कीजिए कि 2tan^(-1)""1/5+tan^(-1)""1/7+2tan^(-1)""1/8=pi/4
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cot^(-1)9+"cosec"^(-1)(sqrt41)/(4)=pi/4
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tan^(-1)""15/8 -sin^(-1)""7/25=cos^(-1)""(297)/(425)
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tan^(-1)""1/4+tan^(-1)""2/9=1/2cos^(-1)""3/5=sin^(-1)""4/5
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cos^(-1)""(63)/(65)+2tan^(-1)""1/5=sin^(-1)""3/5
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tan^(-1)1+tan^(-1)2+tan^(-1)3=pi
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cot^(-1)3+cot^(-1)""3/4=cot^(-1)"'1/3
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2tan^(-1)""1/5+sec^(-1)""(5sqrt2)/(7)+2tan^(-1)""1/8=pi/4
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4tan^(-1)""1/5-tan^(-1)""1/70+tan^(-1)""1/99=pi/4
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