Q2. Without using trigonometric tables, prove that: sec70° sin20° - cos20° cosec70° = 0

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Trigonometric Ratios Of Complementary Angles (Part 3) | Introduction to Trigonometry | CBSE | Class 10 | Math

Q2. Without using trigonometric tables, prove that: sec70° sin20° - cos20° cosec70° = 0

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