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    Question

    If sinθ = 3/5 and θ is an acute angle, find cos

    θ.
    A 4/5 Correct Answer Incorrect Answer
    B 5/4 Correct Answer Incorrect Answer
    C 3/4 Correct Answer Incorrect Answer
    D 7/9 Correct Answer Incorrect Answer

    Solution

    ATQ, sin²θ + cos²θ = 1  (3/5)² + cos²θ = 1  9/25 + cos²θ = 1  cos²θ = 16/25  cosθ = 4/5  

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