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The legs of a right triangle measuring 5 inches and 7 units. If theta is the angle between the 5-inch leg and the hypotenuse, cos theta = ..what?
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The legs of a right triangle measuring 5 inches and 7 units. If theta is the angle between the 5-inch leg and the hypotenuse, cos theta = ..what?

User Sargue
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1 Answer

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By Pythagorean's theorem, a^2 + b^2 = c^2
5^2 + 7^2 = c^2
74 = c^2
c = sqrt(74)
So, now we know that the answer is 5/sqrt(74).
This can also be written as (5sqrt(74))/74
User Reeno
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