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If tan^(-1)x+tan^(-1)y=(4pi)/5, find cot...

If `tan^(-1)x+tan^(-1)y=(4pi)/5,` find `cot^(-1)x+cot^(-1)ydot`

A

`pi`

B

`(pi)/(5)`

C

`(2pi)/(5)`

D

`(3pi)/(5)`

Text Solution

Verified by Experts

The correct Answer is:
B
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
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  4. If sin ^(-1) ((x)/(13))+"cosec"^(-1)((13)/(12))=(pi)/(2) then the v...

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  11. सिद्ध कीजिए कि cot^(-1)((ab+1)/(a-b))+cot^(-1)((bc+1)/(b-c))+cot^(...

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  12. If tan^-1x+tan^-1y+tan^-1z=pi/2,then

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  13. 4tan^(-1)""(1)/(5)-tan^(-1)""(1)/(239)=

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