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Chapter Summary

Trigonometric Tables

ICSE · Class 10 · Mathematics

Summary of Trigonometric Tables for ICSE Class 10 Mathematics. Key concepts, important points, and chapter overview.

31 questions25 flashcards5 concepts

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An illustration showing the conversion process between decimal degrees and degrees, minutes, and seconds (DMS) format, with examples.
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Overview

Trigonometric tables give approximate values of sine, cosine, and tangent for angles from 0° to 90°, correct up to four places of decimals. These tables are used when exact calculation is difficult and a close decimal value is needed. Angle measurement uses degree, minute, and second: 1 degree = 60

Key Concepts

An angle can be divided into

An angle can be divided into smaller parts. 1° = 60′ and 1′ = 60″. This makes it possible to express angles more precisely.

A decimal degree is first split

A decimal degree is first split into degrees and decimal minutes. The decimal minutes are then converted into seconds if required. For example, (20.6)

A trigonometric table contains approximate values

A trigonometric table contains approximate values of sine, cosine, and tangent for angles between 0° and 90°, correct up to four decimal places.

The first column on the extreme

The first column on the extreme left contains degrees from 0° to 90°. The table has ten main minute columns headed by 0′, 6′, 12′, 18′, 24′, 36′, 42′,

Mean difference columns are used

Mean difference columns are used to adjust the value of a trigonometric function to the fourth decimal place. The mean difference is added when the fu

Learning Objectives

  • Understand the relationship between degrees, minutes, and seconds.
  • Convert decimal degrees into degrees, minutes, and seconds.
  • Recognize the use of trigonometric tables for sine, cosine, and tangent values.
  • Identify the structure of a trigonometric table.
  • Apply the rule for mean differences correctly.

Frequently Asked Questions

What are the important topics in Trigonometric Tables for ICSE Class 10 Mathematics?
Trigonometric Tables covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Trigonometric Tables — ICSE Class 10 Mathematics?
Understand the core concepts first, then work through the 31 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Trigonometric Tables

All 22 chapters — ICSE Class 10 Mathematics Chapter Summary

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