1. 0
2. 1
3. 2
4. 3
2
1. 0
2. 1
3. 2
4. 3
0
1. (2n+1)π/2
2. (2n+1)π
3. nπ
4. 2nπ
(2n+1)π/2
1. x+y-1=0
2. x-y-1=0
3. x+y+1=0
4. x-y+1=0
x-y+1=0
1. 72
2. 192
3. 200
4. 248
248
1. cos θ
2. cos 2θ
3. sin θ
4. sin 2θ
sin 2θ
1. 3π
2. 6π
3. 9π
4. 12π
12π
1. 0
2. 1/2
3. 1
4. 4cos α cos β cos γ
0
1. 1/16
2. 1/8
3. 1/12
4. 1/4
1/16
1. 1-4cosAcosBcosC
2. 1-4sinAsinBsinC
3. 4cosAcosBcosC
4. 4sinAsinBsinC
1-4sinAsinBsinC