# Range of Expressions using Trigonometric Substitution

Range of Expressions using Trigonometric Substitution Range of different trigonometric functions helps us to use these functions as substitution in many algebraic expressions. This simplifies the give expression to another expression, the range of which can be easily determined. Example 1: If x² + y² = 4, then find the maximum value of . Solution: Read more about Range of Expressions using Trigonometric Substitution[…]

# Mirror Formula and Magnification

Mirror Formula and Magnification Mirror formula gives the relationship between image distance, object distance and the focal length of the mirror and this formula is valid in all situations for all spherical mirrors for all positions of the object. Magnification produced by a spherical mirror gives the relative extent to which the image of an Read more about Mirror Formula and Magnification[…]