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Worked problems, method notes and exam strategy from the people who teach the classes.

Illustration for Trigonometric Ratios of 0°, 30°, 45°, 60° and 90°, Class 10 Introduction to Trigonometry

Trigonometric Ratios of 0°, 30°, 45°, 60° and 90°, Class 10

Derive the exact trigonometric ratios of 0, 30, 45, 60 and 90 degrees from simple triangles, learn the full table with its not-defined entries, and use it to evaluate expressions and find unknown angles.

8 min read Equations

Illustration for Trigonometric Ratios Explained with Examples, Class 10 Introduction to Trigonometry

Trigonometric Ratios Explained with Examples, Class 10

Learn what sine, cosine, tangent and their reciprocals mean in a right triangle, why they depend only on the angle, and how to find all six ratios when one is given, with six worked examples.

9 min read Equations

Illustration for The Direction Indian Economic Planning Has Taken Managerial Economics

The Direction Indian Economic Planning Has Taken

A plan-by-plan look at India's Five Year Plans, from the First Plan of 1951 to the Twelfth: each plan's focus, its growth target and what it actually achieved.

7 min read

Illustration for India’s Five Year Plans Managerial Economics

India’s Five Year Plans

The salient features of India's Five Year Plans: democratic and decentralised planning, central and state plans, public and private outlays, core objectives and shortfalls.

5 min read

Illustration for Class 10 Coordinate Geometry Practice Questions with Solutions Coordinate Geometry

Class 10 Coordinate Geometry Practice Questions with Solutions

Seventeen original Class 10 coordinate geometry questions with full solutions on distance, collinearity, identifying shapes, the section formula, midpoints, ratios, trisection and the centroid.

8 min read Equations

Illustration for Section Formula and Midpoint Formula for Class 10 Coordinate Geometry

Section Formula and Midpoint Formula for Class 10

Derive the section formula using similar triangles, then use it for midpoints, ratios in k to 1 form, division by an axis, points of trisection, the missing vertex of a parallelogram and the centroid.

10 min read Equations

Illustration for Economic Planning in India Managerial Economics

Economic Planning in India

How economic planning began in India: from Visvesvaraya's 1934 book and the National Planning Committee to the Planning Commission of 1950 and the First Five Year Plan.

2 min read

Illustration for Income Inequality, and How It Is Measured Managerial Economics

Income Inequality, and How It Is Measured

How income and wealth inequality differ from poverty, how the Lorenz curve and Gini coefficient measure inequality, and the main causes of unequal incomes.

4 min read

Illustration for Distance Formula in Coordinate Geometry: Class 10 Guide Coordinate Geometry

Distance Formula in Coordinate Geometry: Class 10 Guide

Learn the distance formula from Pythagoras, then use it to test collinearity, classify triangles and quadrilaterals, find unknown coordinates and locate equidistant points, with six worked examples.

9 min read Equations

Illustration for How Poverty Is Measured Managerial Economics

How Poverty Is Measured

How poverty is measured: income thresholds, the World Bank's international poverty line, and the difference between absolute and relative poverty.

2 min read

Illustration for Poverty: What It Is and Who It Reaches Managerial Economics

Poverty: What It Is and Who It Reaches

Poverty is the lack of resources for a minimum standard of living. What it means, how the international poverty line works, and what poverty does to children.

4 min read

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