Express Each of the Following in Terms of Angles Between 0°And 45°: Cosec 68°+ Cot 72° - Mathematics

Sum

Express the following in term of angles between 0°and 45°:
cosec 68° + cot 72°

Solution

cosec 68° + cot 72°

= cosec(90 - 22)° + cot(90 - 18)°

= sec 22° + tan 18°

Concept: Trigonometric Ratios of Complementary Angles
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APPEARS IN

Selina Concise Mathematics Class 9 ICSE
Chapter 25 Complementary Angles
Exercise 25 | Q 4.2 | Page 310