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NDA Math Trigonometric Ratios of Angles and Equations Part 2

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Question : 5 of 75

Marks: +1, -0

In a triangle ABC,a=4,b=3,c=2 What is cos‌3‌C equal to?

‌
7
128
‌
11
128
‌
7
64
‌
11
64

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