Consider the followng statements
1.(1+tan²θ)/(1+cot²θ)=[(1-tanθ)/(1-cotθ)]² is true for all 0<θ<π/2,θ≠π/4
2.cotθ=1/tanθ is true for θ=45° only
Which of the above statement is/are correct?
20% of a number when added to 20 becomes the number itself,then the number is
Which one of the following is correct?
The sum of first 47 terms of the series (1/4+1/5-1/6-1/4-1/5+1/6+1/4+1/5-1/6... is
Three athletes run a 4km race.Their speeds are in the ratio 16:15:11.When the winner wins the race,distance between the athlete in the second position to the athlete in the third position is
If a:b=3:5 and b:c=7:8 ,then 2a:3b:7c is equal to