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    Question

    What is the value of 4/3 (sin ² 65 º + sin ² 25 º

    ).
    A 4/3 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 3 Correct Answer Incorrect Answer
    D 2/3 Correct Answer Incorrect Answer

    Solution

    We know that, (sin2θ + cos2θ) = 1 And, sin(90° - θ) = cosθ Now, 4/3 (sin ² 65 º + sin ² 25 º ) 4/3 (sin ² 65 º + sin ² (90º - 65 º ) 4/3 (sin ² 65 º + cos ² 65 º 4/3 x 1 = 4/3

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