1. 1/2
2. √3/2
3. -1/2
4. -√3/2
√3/2
1. i sin x
2. sin (ix)
3. - sin x
4. i sin (ix)
i sin x
1. Right angled
2. Isosceles
3. Equilateral
4. Scalene
Isosceles
1. Arithmetic
2. Harmonic
3. Geometric
4. Arithmetico - geometric
Harmonic
1. r1-r
2. r1+r
3. r-r1
4. R
r<sub>1</sub>-r
1. 0
2. α
3. β
4. 1
0
1. x = 0
2. x2 + y2=3
3. y = x
4. 6x = 7
6x = 7
1. 2
2. 4
3. 6
4. 14
2
1. 0
2. π/4
3. π/3
4. π/2
0
1. y2 = 4x2
2. 4y2 = x2
3. y =3x
4. 4x + y=0
y<sup>2</sup> = 4x<sup>2</sup>