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# I need help with a pre-calculus trig question?

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- PopeLv 71 year agoFavorite Answer
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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