1. sin A/4. Sin B/.sin C/4
2. cos A/4.cos B/4. Cos C/4
3. tan A/4.tanB/4. tan C/4
4. cot A/4 cot B/4..cot C/4
cot A/4 cot B/4..cot C/4
1. tan A tan B tanC
2. tan 2A+ta 2B+ tan 2C
3. tan 2A tan 2Btan 2C
4. none
tan A tan B tanC
1. sin θ
2. cos θ
3. tan θ
4. cot θ
tan θ
1. 2
2. √3
3. √2
4. 1
2
1. 2 sin θ
2. 2 cos θ
3. 2 tan 2θ
4. 2 cot 2θ
2 tan 2θ
1. 1+ 2 sin 2θ
2. 1+ 2 sin 2θ
3. 1+ 2 cos 2θ
4. 1- 2 cos 2θ
1+ 2 sin 2θ
1. 0
2. 1
3. 2
4. 3
3
1. sin A/2
2. cos A/2
3. tan A/2
4. cot A/2
cot A/2
1. (2cos 2x+1)/(2cos 2x-1)
2. (2sin 2x+1)/(2sin 2x-1)
3. (2 cot 2x+1)/(2cot2x-1)
4. (2 sec 2x+1)/ (2sec 2x-1)
(2cos 2x+1)/(2cos 2x-1)
1. 2
2. √3
3. √2
4. 1
1