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State for any acute angle θ whether cos θ increases or decreases as θ increases - Mathematics

MCQ
Sum

State for any acute angle θ whether cos θ increases or decreases as θ increases.

Options

  • Increases

  • Decreases

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Solution

For acute angles, remember what cosine means: base over hypotenuse. If we increase the angle, then the hypotenuse side gets larger. That means "base/hypotenuse" gets smaller or decreases.

Concept: Trigonometric Equation Problem and Solution
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APPEARS IN

Selina Concise Mathematics Class 9 ICSE
Chapter 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (A) | Q 9.2 | Page 292
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