The distance​ D, in​ miles, to the horizon from an​ observer's point of view over water or​ "flat" earth is given​ below, where H is the height of the point of​ view, in feet. If a person whose eyes are 5 ft above ground level is standing at the top of a hill 67 ft above​ "flat" earth, approximately how far to the horizon will she be able to​ see?   d=√2h

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A: ANSWER : 400 square feet EXPLANATION :

Q: 120°

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Q: Question 4: Find "a" and "x"| B 81 D.

A: Use the property of cyclic quadrilateral. The sum of the opposite angles are 180°.

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Q: A 43° 61° B C

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Q: 30°

A: we know that hypo/perpendicular = cosec 30  note that cosec 30 = 2

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.