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Trigonometry XI

Trigonometric Ratios of multiple and some special angles

Find the values of the following angles:

Suggested answer:

(vii) sin 18^o

Let A = 18, then

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	Introduction
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	Measurement of Angles
	Radian measure [Circular system]
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	Trigonometric Functions
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	Signs of Trigonometric Ratios
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	Trigonometric Ratios of Multiple and Sub-multiple Angles
	Trigonometric Ratios of multiple and some special angles
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	Summary
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