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A ladder makes tan θ = 3/4 with the ground, θ acute. What is sec θ?
A3/5
B4/3
C5/3
D5/4
Answer & Solution
Correct answer: D. 5/4
With 1 + tan²θ = sec²θ, sec²θ = 1 + 9/16 = 25/16, so sec θ = 5/4 for an acute angle.
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