Trigonometric Tables
ICSE · Class 10 · Mathematics
Flashcards for Trigonometric Tables — ICSE Class 10 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
How many minutes are there in 1 degree?
Answer
1 degree = 60 minutes (60') This subdivision helps us measure angles more precisely than just using whole degrees.
How many seconds are there in 1 minute of angle measurement?
Answer
1 minute = 60 seconds (60'') So the complete hierarchy is: 1° = 60' = 3600''
Convert 20.6° into degrees and minutes.
Answer
20.6° = 20° + 0.6° = 20° + (0.6 × 60)' = 20° + 36' = 20°36'
Convert 12.54° into degrees, minutes, and seconds.
Answer
12.54° = 12° + 0.54° = 12° + (0.54 × 60)' = 12° + 32.4' = 12° + 32' + 0.4' = 12° + 32' + (0.4 × 60)'' = 12°32'24''
What are trigonometric tables used for?
Answer
Trigonometric tables are used to find approximate values of sine, cosine, and tangent of angles between 0° and 90°, accurate up to four decimal places.
What is the accuracy level of values in trigonometric tables?
Answer
Trigonometric tables provide values correct up to four places of decimals (e.g., 0.5000, 0.8660, etc.)
How many columns are there in each trigonometric table?
Answer
Each trigonometric table is divided into 12 columns: - 1 column for degrees (0° to 90°) - 10 columns for minutes (0', 6', 12', 18', 24', 30', 36', 42', 48', 54') - 1 column for mean differences
What does the first column of a trigonometric table contain?
Answer
The first column on the extreme left contains degrees from 0° to 90°. This is the main angle reference column.
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