II. MULTIPLE CHOICES. Read and analyze the questions carefuly. Choose the letter of the correct answer and write it on the blank before each number. 1. What trigonometric ratio corresponds to the ratio of the side opposite an acute angle in a right triangle to its hypotenuse? A. Sine C. Tangent 2. In AECQ, 2Q is a right angle. Which side of the triangle is the hypotenuse? С. ЕО 3. Which of these trigonometric ratios is the reciprocal of sec 0? C. tan 0 B. Cosine D. Secant A. EC B. CQ D. None of the above A. sin 0 B. cos 0 D. csc 0 4. In AFGH, mzH = 90°, GH = 7cm, HI = 24cm, and GI = 25cm. Which of the following ratios %3D %3D %3D %3D represents tan H? 25 B. 24 24 D. A. C. 24 10 5. Which of the following statements is INCORRECT? 6. 3. A. sin N = B. cot S = C. sec N = D. tan N = 8 6. What trigonometric ratio corresponds to the ratio of the side adjacent to the acute angle in a right triangle to the side opposite to it? A. Sine B. Cosine C. Tangent D. Cotangent 7. Given ASOC where 2C is a right angle; which side is opposite to angle S? С. ОС A. SC B. SO D. None of the above _8. In ASCI, mz) = 90°, S = 20cm, JD = 21cm, and SD = 29cm. Which of the following atios represents sin S? %3D 21 A. 29 В. 29 C. 20 20 D. 29

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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.