Posted by **edward** on Thursday, May 23, 2013 at 3:15pm.

1.)Sin^-1(x)+Sin^-1(y)+Sin^-1(z)= pie

Prove that

X.root(1-y^2)+y.root(1-x^2)+z.root(1-z^2)=2xyz

2.)tan^-1(yz/xr)+tan^-1(zx/yr)+tan^-1(xy/zr)=pie/4

Prove that

x^2+y^2+z^2=r^2

Tomorrow is my exam.please give me answer as soon as possible.

## Answer This Question

## Related Questions

- physics - The motion of a particle is described by x = 10 sin (piet +pie/2 ). At...
- Math- Trig - 1. Determine the exact value of cos^-1 (pi/2). Give number and ...
- math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- Trigonometry desperate help, clueless girl here - 2. solve cos 2x-3sin x cos 2x...
- Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...
- Trigonometry - 1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two ...
- precalculus - For each of the following determine whether or not it is an ...
- Trig Identities - Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = ...
- trigonometry hlp me - 6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y...

More Related Questions