Find the value of
sec (-14700)
To find: Value of sec (-1470°)
We have,
sec (-1470°) = sec (1470°)
[∵ sec(-θ) = sec θ]
= sec [90° × 16 + 30°]
Clearly, 1470° is in Ist Quadrant and the multiple of 90° is even
= sec 30°