Trigonometry
- Learn Trigonometry in easy way Watch this video std 10th
- A kite is flying at a height of 60 m above the ground. The string attached to the kite is tied at the ground. It makes an angle of 60° with the ground. Given data: Height of kite above the ground: 60 m Angle between the string and the ground: 60° Formula used: sine function: sin(angle) = opp... 1
- A storm broke a tree and the treetop rested 20 m from the base of the tree, making an angle of 60° with the horizontal. Find the height of the tree. Correct Answer is 40+20√3 m 1
- Two poles of heights 18 metre and 7 metre are erected on a ground. The length of the wire fastened at their tops in 22 metre Correct answer is 30 degree 1
- Two buildings are facing each other on a road of width 12 metre. From the top of the first building, which is 10 metre high, the angle of elevation See image for answer 2
- From the top of a lighthouse, an observer looking at a ship makes angle of depression of 60°. If the height of the lighthouse is 90 metre Correct Answer is 51.9 m 1
- A person is standing at a distance of 80m from a church looking at its top. The angle of elevation is of 45°. Find the height of the church Correct Answer is 80 m 1
- proove that tan theta\sec theta - 1= tan theta + sec theta + 1/ tan theta + sec theta - 1} Hence , prooved 2
- Prove That: Sec 4 a ( 1 − Sin 4 a ) − 2 Tan 2 a = 1 Hence , prooved 2
- Prove That: Tan a ( 1 + Tan 2 a ) 2 + Cot a ( 1 + Cot 2 a ) 2 = Sin a Cos a Hence , prooved 2
- If tanθ+ 1/tanθ =2 thenshow that tan ^2 θ+ 1/ tan^2θ=2 Hence prooved 2
- proove that viii. } secθ+tanθ=cosθ/(1−sinθ) Hence , prooved 2
- Proove that vii. sin^4 θ – cos^4 θ = 1 – 2 cos^2 θ Hence , prooved 2
- prove that vi ) 1/secθ−tanθ=secθ+tanθ Hence , prooved 2
- proove that v. cot θ + tan θ =cosec θ. sec θ Hence , prooved 2
- proove that iv. (sec θ – cos θ) (cot θ + tan θ)= tan θ. sec θ Hence , prooved 2
- Prove that √1-sinθ/1+sinθ=secθ−tanθ Hence , prooved 2
- prove that cos^2 θ (1+ tan2 θ) = 1 Hence , prooved 2
- prove that sin^2θ/cosθ+cosθ=secθ Solution is in img format 2
- If tan θ = 1, then find the value of sinθ+ cosθ /secθ+cosecθ value of equation is 1/2 1
- If 5 sec θ – 12 cosec θ = θ, find the values of sec θ, cos θ and sin θ. Values of secθ is 13/ 5 , cos theta is 5/13 and sin theta is 12/13 1
- If cot θ = 40/9, find the values of cosec θ and sin θ Correct answer for cosec θ is 41/9 and for sinθ is 9/41 1
- If tan θ = 3/4, find the values of sec θ and cos θ. Correct answer for secθ=5/4 and cosθ=4/5 Solution:: 1
- If sin θ = 7/25, find the values of cos θ and tan θ. Value of cosθ is 24/25 , tanθ=7/24 Solution:: 1