1. 0
2. 1/2
3. -1/2
4. -1
-1/2
1. (2/3)i-(1/3)j+(2/3)k
2. (2/5)i-(1/5)j+(2/5)k
3. (2/√3)i-(1/√3)j+(2/√3)k
4. -(2/√3)i-(1/√3)j-(2/3)k
(2/3)i-(1/3)j+(2/3)k
1. √23 sq unit
2. √21 sq unit
3. √29 sq unit
4. √33 sq unit
√29 sq unit
1. 1
2. -1
3. 0
4. 2
-1
1. 70
2. 60
3. 50
4. none of these
60
1. y(x2-y2) / (x2+y2)
2. x(y2+x2) / (y2-x2)
3. x(x2+y2) / (x2-y2)
4. x(x2-y2) / (x2+y2)
x(y<sup>2</sup>+x<sup>2</sup>) / (y<sup>2</sup>-x<sup>2</sup>)
1.
2.
3.
4.
1. 0
2. 1
3. x+y+z
4. 1+x+y+z
0
1. 8/5
2. 5/8
3. -8/5
4. -5/8
-8/5
1. 3/2
2. 3
3. -3
4. 0
3/2