The first problem tests you knowledge on basic trigonometric functions, such as sine, cosine, and tangent. Make sure to, for this right triangle trigonometry problem, to find the correct side lengths needed to evaluate the given trigonometric functions.

    Q1.

    Triangle ABC is shown above. What is the value of tan(<ABC)?

    A. 4/5

    B. 5/4

    C. 4/2.6

    D. 2.6/4

    Answer: B

    Explanation: The correct answer is B. The function tan(<ABC) equals to the (opposite/adjacent) lengths in respect to the angle <ABC. The length of the side opposite to <ABC is 10, while the side opposite to <ABC is 8. Therefore, tan(<ABC) is 10/8, which can be simplified to 5/4.