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Find Angle 'A' If : - Mathematics

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प्रश्न

Find angle 'A' if :

बेरीज

उत्तर

From the figure we have

cos A = `(10)/(20)`

cos A = `(1)/(2)`

cos A = cos 60°

A = 60°

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Solution of Right Triangles
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पाठ 24: Solution of Right Triangles [Simple 2-D Problems Involving One Right-angled Triangle] - Exercise 24 [पृष्ठ ३०३]

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सेलिना Concise Mathematics [English] Class 9 ICSE
पाठ 24 Solution of Right Triangles [Simple 2-D Problems Involving One Right-angled Triangle]
Exercise 24 | Q 2.1 | पृष्ठ ३०३
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