Question Answers

A plane mirror and a concave mirror are arranged as shown in figure and O is a point object. Find the position of image formed by two reflections, first one taking place at concave mirror. A plane mirror and a concave mirror are arranged as shown in figure and O is a point object. Find [...]

Prove the following identities, where the angles involved are acute angles for which the expressions are defined. (iii) 1−cotθ/tanθ + 1−tan/θcotθ =1+secθcosec θ Prove the following identities where the angles involved are acute angles for which the expressions are defined. (iii) 1−cotθ/tanθ + 1−tan/θcotθ =1+secθcosec θ October 5, 2020 Category: Chapter 8 - Introduction to [...]

Prove that cos A/1+sin A + 1+sin A/cos A = 2 sec A Prove that cos A/1+sin A + 1+sin A/cos A = 2 sec A October 5, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,

Prove that (cosec theta-cot theta)^2=(1-cos theta),(1+cos theta) (1+cos theta) Prove that (cosec theta-cot theta)^2=(1-cos theta) October 5, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,

A concave mirror forms a real image three times larger than the object on a screen. The object and screen are moved until the image becomes twice the size of the object. If the shift of the object A concave mirror forms a real image three times larger than the object on a screen. The [...]

Choose the correct option. Justify your choice. (iv) 1+tan^2 A/1+cot^2 A = Choose the correct option. Justify your choice. (iv) 1+tan^2 A/1+cot^2 A = October 5, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,

Choose the correct option. Justify your choice. (iii) (sec A + tan A) (1 – sin A) = Choose the correct option. Justify your choice. (iii) (sec A + tan A) (1 - sin A) = October 5, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,

Choose the correct option. Justify your choice. (ii) (1 + tan θ + sec θ) (1 + cot θ – cosec θ) = Choose the correct option. Justify your choice. (ii) (1 + tan θ + sec θ) (1 + cot θ - cosec θ) = October 5, 2020 Category: Chapter 8 - Introduction to [...]

Choose the correct option. Justify your choice. (i) 9 sec^2 A – 9 tan^2 A = Choose the correct option. Justify your choice. (i) 9 sec^2 A - 9 tan^2 A = October 5, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,

When an object is placed at a distance of 25 cm from a mirror, the magnification is m1. The object is moved 15 cm farther away with respect to the earlier position, and the magnification and the magnification the magnification is m1. The object is moved 15 cm farther away with respect to the earlier [...]