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The distance between the two points pictured is d= Vn
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according to the condition w+l=48 and w*l=95.
Using these two equation:
according to the condition w+l=48 and w*l=95.
Using these two equation:
Given:
To find:
The exact value of cos(u-v) if both angles are in quadrant 3.
Solution:
In 3rd quadrant, cos and sin both trigonometric ratios are negative.
We have,
Now,
On further simplification, we get
Similarly,
Now,
Therefore, the value of cos (u-v) is 0.1872.