Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 year ago

I need help with a pre-calculus trig question?

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  • Pope
    Lv 7
    1 year ago
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    csc(A) = csc(π/4), 0 ≤ A ≤ 2π, A ≠ π/4

    That places A in quadrant I or II, but not I.

    A = 3π/4

    cot(B) = cot(3π/4), 0 ≤ B ≤ 2π, B ≠ 3π/4

    That places B in quadrant II or IV, but not II.

    B = 7π/4

    sec(C) = sec(8π/5), 0 ≤ C ≤ 2π, C ≠ 8π/5

    That places C in quadrant I or IV, but not IV.

    C = 2π/5

    A + B + C = (3/4 + 7/4 + 2/5)π = (29/10)π = 2.9π

    k = 2.90 (exactly)

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