1. 1/4(1+3 cos2 2A)
2. 1/4(1- 3 cos2 2A)
3. 1/4(1+2 cos2 3A)
4. 1/4(1- 2cos2 3A)
1/4(1+3 cos2 2A)
1. (a, a)
2. (0, a)
3. (a, 0)
4. (-a, 0)
(a, 0)
1. 1/a+1/b=1/c
2. 1/a+1/b=1/c2
3. 1/a2+1/b2=1/c
4. 1/a2+1/b2=1/c2
1/a2+1/b2=1/c
1. (a+b)2=c
2. (a+b)2=2c
3. (a-b)2=c
4. (a-b)2=2c
(a+b)2=2c
1. 2 sin 6θ cos 4θ
2. 2 cos 6θ cos θ
3. 2 cos 4θ sin 2θ
4. 2 sin 4θ cos 2θ
2 sin 6θ cos 4θ
1. a=2c a) a=2c b) |a|=2c c) 2|a|=c d) |a|=c
2. |a|=2c
3. 2|a|=c
4. |a|=c
|a|=c
1. x2+y2+2x-2y+1=0
2. 2x2+2y2+12x-2y+1=0
3. x2+y2+2x+12y-11=0
4. 3x2+3y2+20x-21y+1=0
x2+y2+2x-2y+1=0
1. 2[cos 2θ- cos 10θ]
2. 2[cos 2θ+ cos 10θ]
3. 2[sin 2θ- cos 10θ]
4. 2[sin 2θ+cos 10θ]
2[cos 2θ- cos 10θ]
1. 1/2(sin 8θ+sin 4θ)
2. 1/2(sin 8θ-sin 4θ)
3. 1/2(cos 8θ+cos 4θ)
4. 1/2(cos 8θ-cos 4θ)
1/2(sin 8θ+sin 4θ)
1. 0
2. 1
3. 2
4. 3
0