Question Number 114656 by vylollloll last updated on 20/Sep/20

2tanx−1=1  ⇔2tanx=1+1  tanx=(2/2)=1

Commented byvylollloll last updated on 20/Sep/20

Commented bybobhans last updated on 20/Sep/20

5cot 10x−1000=1000  5cot 10x = 1000+1000  5cot 10x=2000⇒cot 10x=((2000)/5)=400

Answered by 1549442205PVT last updated on 20/Sep/20

tanx=1⇔x=(π/4)+kπ