Question
If 180 meter long train crosses a pole in 9 seconds,
find the speed of train in kilo meter/hour.Solution
Distance =180m, time =9sec Speed =180/9=20m/sec 20×18/5 km/h =72km/h
(tan 5x - tan 3x - tan 2x) = ?
If tan θ + cot θ = 2 where 0 < θ < 90 ; find the value of tan17 θ + cot19 θ.
A man observes the top of a tower at an angle of elevation of 30°. He walks 100 meters closer to the tower, and the angle of elevation becomes 60°. If...
Simplify the given equation:
What is the value of sin (B – C) cos (A – D) + sin (A – B) cos (C – D) + sin (C – A) cos (B – D)?
A man is standing at a point 20 meters away from a vertical tower. The angle of elevation from the point to the top of the tower is 60°. Find the heigh...
Simplify the following trigonometric expression:
10 cos 71° sec 19° − 4 cot 62° tan 28°
If tan 3.5θ x tan 6.5θ = 1 then the value of tan 5θ is
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