Related InterviewSolutions

• Prove that : `(tan theta)/(sectheta+1)-(tantheta)/(1-sectheta)=2cosec theta`
• `(tantheta+2)(2 tantheta+1) = 5 tantheta+ sec^(2)theta`
• Prove that : `tantheta+tantheta+tan(90^(@)-theta)=sectheta*sec(90^(@)-theta)`
• If `1+sin^(2)theta = 3sinthetacostheta`, then prove that `tantheta=1` or `1/2`.
• The angleof elevation of the top of a tower from a certain point is `30o`. If theobserver moves 20 m towards the tower, the angle of elevation of the top ofthe tower increases by `15o`. Theheight of the tower is(a) 17.3m (b) 21.9 m (c) 27.3 m (d) 30 m
• The lower window of a house is at a height of 2m above the ground and its upper window is 4m vertically above the tower window. At certain instant the angles of elevation of a balloon from these windows are observed to be `60^(@)` and `30^(@)`, respectively. Find the height of the balloon above the ground.