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What is ( tan x + tan y ) ( 1 - cot x co...

What is `( tan x + tan y ) ( 1 - cot x cot y ) + ( cot x + cot y ) ( 1- tan x tan y ) ` equal to ?

A

0

B

1

C

2

D

4

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Knowledge Check

  • If tan (cot x) = cot (tan x), then sin 2x is equal to :

    A
    `2/((2n+1)pi)`
    B
    `(4)/((2n+1) pi)`
    C
    `(2)/(n(n+1)pi)`
    D
    `(4)/(n(n+1)pi)`

  • cot x+ tan x=

    A
    `cot 2x`
    B
    `2 cot ^(2) x`
    C
    `sec x cosec x`
    D
    `cot ^(2) 2x`

  • tan(cot^(-1)x) is equal to

    A
    `(pi)/(2)-x`
    B
    `cot(tan^(-1)x)`
    C
    `tan x `
    D
    none of these

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    If tan A - tan B =x and cot B - cot A=y, then: cot(A-B)=

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