1. ∆/8
2. 2/r
3. 1/r
4. 3/r
1/r
1. 2π/3
2. π/3
3. π/6
4. π/2
π/6
1. 3/2 km
2. √2/3 km
3. (√3+1)/2 km
4. √3 km
3/2 km
1. (0,2π)
2. (-1,1)
3. (-∞,∞)
4. (1,1)
(0,2π)
1. 0
2. 1
3. log(√2+1)
4. log(√2-1)
log(√2+1)
1. (-∞,∞)
2. (-1,1)
3. (1, ∞)
4. (0,1)
(1, ∞)
1. 0
2. 2
3. √2
4. 2√2
2
1. none of these
2. right angled
3. isosceles
4. equilateral
none of these
1. 2
2. 7
3. -2
4. 0
0
1. 0,1
2. 1,0
3. 1,1
4. 0,0
1,0