📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!


    Question

    Find the value of sin²18° + sin²72° + cos²63° +

    cos²27°.
    A 1 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer

    Solution

    sin²18° + sin²(90° − 18°) + cos²63° + cos²(90° − 63°)
    = sin²18° + cos²18° + cos²63° + sin²63°
    = 1 + 1 = 2

    Practice Next

    Relevant for Exams:

    ask-question

    Not sure which exam is best for you Talk to our expert

    Get My Free Call