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Andreyy89
3 years ago
11

A point on the terminal side of an acute angle in standard position is (1, 2 √2). Find the cosine value of this angle.

Mathematics
1 answer:
kozerog [31]3 years ago
4 0

Answer:

cos\theta=1/3

Step-by-step explanation:

The point at the terminal side of an acute angle is given by (1, 2\sqrt{2} ).

That is,

x = 1 and y= 2\sqrt{2} .

Let r be the length of line segment drawn from the origin to the point and is given by the formula:

r = \sqrt{x^{2} + y^{2}}

Substituting the values of x and y into r,

r = \sqrt{1^{2} + (2\sqrt{2} )^{2}}

r = \sqrt{1 + 8}

r = \sqrt{9}

Thus, r=3

Also, cos\theta is given by:

cos\theta = x/r\\

Substituting values of x and r,

cos\theta = 1/3\\

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