Chapter 8 – Introduction to Trigonometry
Prove the following tan θ + tan (90° – θ) = sec θ sec (90° – θ)
25
Nov
Prove the following tan θ + tan (90° – θ) = sec θ sec (90° – θ) Prove the following tan θ + tan (90° – θ) = sec θ sec (90° – θ) November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
Prove the following 1 + cot^2 a/ 1 + cosec a = cosec a
25
Nov
Prove the following 1 + cot^2 a/ 1 + cosec a = cosec a Prove the following 1 + cot^2 a/ 1 + cosec a = cosec a November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
Prove the following (√3 +1)(3 – cot 30°) = tan^3 60° – 2 sin 60°
25
Nov
Prove the following (√3 +1)(3 – cot 30°) = tan^3 60° – 2 sin 60° Prove the following (√3 +1)(3 – cot 30°) = tan^3 60° – 2 sin 60° November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
Prove the following (sin α + cos α) (tan α + cot α) = sec α + cosec α
25
Nov
Prove the following (sin α + cos α) (tan α + cot α) = sec α + cosec α Prove the following (sin α + cos α) (tan α + cot α) = sec α + cosec α November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
Prove the following If tanA = 3/4 , then sinA cosA = 12/25 .
25
Nov
Prove the following If tanA = 3/4 , then sinA cosA = 12/25 . Prove the following If tanA = 3/4 then sinA cosA = 12/25 . November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
Prove the following tan A/ 1+sec A – tan A/ 1-sec A = 2 cosec A
25
Nov
Prove the following tan A/ 1+sec A – tan A/ 1-sec A = 2 cosec A Prove the following tan A/ 1+sec A - tan A/ 1-sec A = 2 cosec A November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,
Prove the following sin θ/ 1 + cos θ + 1 + cos θ /sin θ = 2 cosec θ
25
Nov
Prove the following sin θ/ 1 + cos θ + 1 + cos θ /sin θ = 2 cosec θ Prove the following sin θ/ 1 + cos θ + 1 + cos θ /sin θ = 2 cosec θ November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: If the height of a tower and the distance of the point of observation from its foot, both, are increased by 10%, then the angle of elevation of its top remains unchanged.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: If the height of a tower and the distance of the point of observation from its foot, both, are increased by 10%, then the angle of elevation of its top remains unchanged. are increased by 10% both then the angle of elevation [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: The angle of elevation of the top of a tower is 30°. If the height of the tower is doubled, then the angle of elevation of its top will also be doubled.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: The angle of elevation of the top of a tower is 30°. If the height of the tower is doubled, then the angle of elevation of its top will also be doubled. then the angle of elevation of its top will also [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: cos θ =a^2 + b^2/2ab where a and b are two distinct numbers such that ab > 0.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: cos θ =a^2 + b^2/2ab where a and b are two distinct numbers such that ab > 0. Write ‘True’ or ‘False’ and justify your answer in each of the following: cos θ =a^2 + b^2/2ab where a and b are two [...]