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11 July, 16:42

Find cos (π/3 + a), where sin (a) = (1/√3), and 0

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Answers (2)
  1. 11 July, 16:53
    0
    a = approx 35.2644

    cos (pi/3+a) = approx 0.999998973

    Step-by-step explanation:

    solve for sin (a)

    sin a = (1/sqroot of 3)

    arcsin sin (a) = arcsin (1/sqroot of 3)

    a = arcsin (1/sqroot 3)

    a=approx 35.2644

    now substitute a into the cos formula
  2. 11 July, 17:19
    0
    answer is (1/2) when a=0
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