šŸ“¢ Too many exams? Don’t know which one suits you best? Book Your Free Expert šŸ‘‰ call Now!


    Question

    If sinĪø = 5/13 for an acute angle Īø, find: (a)

    cosĪø, (b) tan(90° āˆ’ Īø).
    A 11/13 and 12/7 Correct Answer Incorrect Answer
    B 12/17 and 13/5 Correct Answer Incorrect Answer
    C 12/13 and 12/5 Correct Answer Incorrect Answer
    D 11/10 and 17/5 Correct Answer Incorrect Answer

    Solution

    sinĪø = 5/13 ⇒ opposite = 5, hypotenuse = 13 cosĪø = √(1 āˆ’ sin²θ) = √(1 āˆ’ 25/169) = √(144/169) = 12/13 tan(90° āˆ’ Īø) = cotĪø = cosĪø/sinĪø = (12/13)/(5/13) = 12/5.

    Practice Next
    ask-question