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Question
Express the following in term of angles between 0° and 45° :
sin 59° + tan 63°
Sum
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Solution
sin 59° + tan 63°
= sin(90° – 31°) + tan(90° – 27°)
= cos 31° + cot 27°
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Chapter 21: Trigonometrical Identities - Exercise 21 (C) [Page 328]
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