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If cot α = 1 and sec β = 3 5 − , where 2 3 π < α < π and π < β < π 2 , then the value of tan ( α + β ) and the quadrant in which α + β lies, respectively are :

1. 7 1 − and IV th quadrant
2. 7 and I st quadrant
3. –7 and IV th quadrant
4. 7 1 and I st quadrant

Correct answer: 7 1 − and IV th quadrant

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