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    Question

    Calculate the value of sin120 o  + cos180

    o  + tan225 o .
    A 1/2 Correct Answer Incorrect Answer
    B 1 Correct Answer Incorrect Answer
    D √3/2 Correct Answer Incorrect Answer

    Solution

    sin120 o  + cos180 o  + tan225 o
    = sin(90 + 30) o  + cos180 o  + tan(180 + 45) o
    = cos30 o  + cos180 o  + tan45 o
    = √3/2 + (-1) + 1 = √3/2

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