If theta =( -7pi )/( 3) , then sec(theta) equals...?

3 answers

sec(-7pi/3) = sec(7pi/3) = sec(7pi/3 - 2pi) = sec(pi/3) = 2
Can you visualize angles better in degrees?
most students can, so
7π/3 = 7(6-°) = 210°

210° is in quadr III
the reference angle is 30° ( we are 30° from the x-axis)
I know cos 30° = √3/2
in III, the cosine, and thus the secant, is negative
sec (7π/3)
= sec 210°
= 1/cos 210°
= 1/(-√3/2)
= -2/√3
scrap my solution

had another "senior moment"
Similar Questions
    1. answers icon 2 answers
  1. Multiple ChoiceWhich expression is NOT equivalent to 1? (theta) means 0 with dash in it. A.)sin^2 (theta)+cot^2 (theta) sin^2
    1. answers icon 0 answers
  2. Suppose that \Theta takes values in [0,1] and its PDF is of the formf_{\Theta }(\theta )= a\theta (1-\theta )^2,\ \ \
    1. answers icon 1 answer
    1. answers icon 1 answer
more similar questions