Chapter 8 – Introduction to Trigonometry
Prove that 1 + sec θ – tan θ / 1 + sec θ + tan θ = 1 – sin θ / cos θ
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Nov
Prove that 1 + sec θ – tan θ / 1 + sec θ + tan θ = 1 – sin θ / cos θ Prove that 1 + sec θ - tan θ / 1 + sec θ + tan θ = 1 - sin θ / cos θ November 25, 2020 Category: Chapter [...]
If a sinθ + b cosθ = c, then prove that a cosθ – b sinθ = a^2+b^2+c^2−−√.
25
Nov
If a sinθ + b cosθ = c, then prove that a cosθ – b sinθ = a^2+b^2+c^2−−√. If a sinθ + b cosθ = c then prove that a cosθ – b sinθ = a^2+b^2+c^2−−√. November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
If sinθ + cosθ = p and secθ + cosecθ = q, then prove that q(p^2 – 1) = 2p.
25
Nov
If sinθ + cosθ = p and secθ + cosecθ = q, then prove that q(p^2 – 1) = 2p. If sinθ + cosθ = p and secθ + cosecθ = q then prove that q(p^2 – 1) = 2p. November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class [...]
If tanθ + secθ = l, then prove that sec = l^2+1/2l
25
Nov
If tanθ + secθ = l, then prove that sec = l^2+1/2l If tanθ + secθ = l then prove that sec = l^2+1/2l November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane, the angles of elevation of the bottom and the top of the flag staff are α and β , respectively. Prove that the height of the tower is ( h tanα /tanβ−tanα)
25
Nov
A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane, the angles of elevation of the bottom and the top of the flag staff are α and β , respectively. Prove that the height of the tower is ( h [...]
The shadow of a tower standing on a level plane is found to be 50 m longer when Sun’s elevation is 30° than when it is 60°. Find the height of the tower.
25
Nov
The shadow of a tower standing on a level plane is found to be 50 m longer when Sun’s elevation is 30° than when it is 60°. Find the height of the tower. The shadow of a tower standing on a level plane is found to be 50 m longer when Sun’s elevation is 30° [...]
The angle of elevation of the top of a tower from two points distant s and f from its foot are complementary. Prove that the height of the tower is √st.
25
Nov
The angle of elevation of the top of a tower from two points distant s and f from its foot are complementary. Prove that the height of the tower is √st. The angle of elevation of the top of a tower from two points distant s and f from its foot are complementary. Prove that [...]
Given that sinθ + 2cosθ = 1, then prove that 2sinθ – cosθ = 2.
25
Nov
Given that sinθ + 2cosθ = 1, then prove that 2sinθ – cosθ = 2. Given that sinθ + 2cosθ = 1 then prove that 2sinθ – cosθ = 2. November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
If 1 + sin^2θ = 3sinθ cosθ, then prove that tanθ = 1 or 1/2 .
25
Nov
If 1 + sin^2θ = 3sinθ cosθ, then prove that tanθ = 1 or 1/2 . If 1 + sin^2θ = 3sinθ cosθ then prove that tanθ = 1 or 1/2 . November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
The angle of elevation of the top of a tower from certain point is 30°. If the observer moves 20 metres towards the tower, the angle of elevation of the top increases by 15°. Find the height of the tower.
25
Nov
The angle of elevation of the top of a tower from certain point is 30°. If the observer moves 20 metres towards the tower, the angle of elevation of the top increases by 15°. Find the height of the tower. the angle of elevation of the top increases by 15°. Find the height of the [...]