Evaluate : Cos 22 ° Sin 68 ° - Mathematics

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Sum

Evaluate : `(cos22°)/(sin 68°)`

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Solution

`(cos22°)/(sin 68°)`

= `cos(90° - 68°)/(sin68°)`

= `(sin 68°)/(sin68°)`

 =1

Concept: Complementary Angles for Sine ( Sin ) and Cosine ( Cos )
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APPEARS IN

Selina Concise Mathematics Class 9 ICSE
Chapter 25 Complementary Angles
Exercise 25 | Q 1.1 | Page 310
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