urgent ..

formula for sin^{-1}X + sin^{-1}Y , sin^{-1}X -sin^{-1}Y

cos^{-1}X + cos^{-1}Y

cos^{-1}X - cos^{-1}Y

formula of 1-sinx

prove: tan inverse [ cos x / (1+sin x)] = pie /4 - (x/2)

URGENT!!

Show that sin^{-1}(4/5) +cos^{-1}(2/square root of 5)=cot^{-1} (2/11)

Please ans in a simple way

show that tan(1/2 sin-1 3/4) = 4-root7/3

prove that :

tan [pi/4 + 1/2 cos^{-1} a/b] + tan[pi/4 - 1/2cos^{-1} a/b] = 2b/a

find the value of x : sin^{-1}x + sin^{-1}(1-x) = cos^{-1}x

Show that tan(1/2sin^{-1}3/4) = (4-Squareroot of 7)/ 3

2tan^{-1}(1/3) +cot^{-1}4 =tan^{-1}(16/13)

i have 2 question -

1)if cos_{-1}(x/a)+cos^{-1}(y/b)=d

prove that : x^{2}/a^{2}-2xy/ab-cosd+y^{2}/b^{2}=sin^{2}d

2)solve tan(cos^{-1}x)=sin(tan^{-1}x)

3)tan^{-1}x+tan^{-1}y+tan^{-1}z=pi/2

prove that xy+yz+zx =1

cos^-1(x) + sin^-1(x/2)=pi/6

find x.

Prove that :

tan^{-1}(1/4) + tan-1(2/9) = 1/2 Cos^{-1} (3/5)

if cos^{-1}x + cos^{-1}y + cos^{-1}z = pi

prove that x^{2} + y^{2} + z^{2} +2xyz = 1

find the greatest and least values:(sin^{-1}x)^{2}+(cos^{-}^{1}x)^{2}

prove that tan ^{-1}(1) + tan^{-1}(2) + tan^{-1}(3) = pie.

Principle value of:

sec-1[cosec pie/8]

urgent ..

formula for sin

^{-1}X + sin^{-1}Y , sin^{-1}X -sin^{-1}Ycos

^{-1}X + cos^{-1}Ycos

^{-1}X - cos^{-1}Yformula of 1-sinx

prove: tan inverse [ cos x / (1+sin x)] = pie /4 - (x/2)

URGENT!!

Show that

sin(4/5) +^{-1}cos(2/square root of 5)=^{-1}cot(2/11)^{-1}Please ans in a simple way

show that tan(1/2 sin-1 3/4) = 4-root7/3

prove that :

tan [pi/4 + 1/2 cos

^{-1}a/b] + tan[pi/4 - 1/2cos^{-1}a/b] = 2b/a^{-1}x-cos^{-1}y=cos^{-1}{xy+whole root over(1-x^{2)}(1-y^{2})^{}}find the value of x : sin

^{-1}x + sin^{-1}(1-x) = cos^{-1}xShow that tan(1/2sin

^{-1}3/4) = (4-Squareroot of 7)/ 32

tan(1/3) +^{-1}cot4 =^{-1}tan(16/13)^{-1}i have 2 question -

1)if cos

_{-1}(x/a)+cos^{-1}(y/b)=dprove that : x

^{2}/a^{2}-2xy/ab-cosd+y^{2}/b^{2}=sin^{2}d2)solve tan(cos

^{-1}x)=sin(tan^{-1}x)3)tan

^{-1}x+tan^{-1}y+tan^{-1}z=pi/2prove that xy+yz+zx =1

cos^-1(x) + sin^-1(x/2)=pi/6

find x.

^{-1}(2-x/2+x) = 1/2 tan^{-1}x/2Prove that :

tan

^{-1}(1/4) + tan-1(2/9) = 1/2 Cos^{-1}(3/5)^{-1}( x+ square root 1-x^{2}/ root 2 in the simplest formif cos

^{-1}x + cos^{-1}y + cos^{-1}z = piprove that x

^{2}+ y^{2}+ z^{2}+2xyz = 1find the greatest and least values:(sin

^{-1}x)^{2}+(cos^{-}^{1}x)^{2}prove that tan

^{-1}(1) + tan^{-1}(2) + tan^{-1}(3) = pie.Principle value of:

sec-1[cosec pie/8]