SOLUTION: If θ is an angle in the second quadrant and secθ = √85/-6, what is the value for cos⁴θ - 2sin²θ + cot³θ, as a decimal?
Algebra ->
Trigonometry-basics
-> SOLUTION: If θ is an angle in the second quadrant and secθ = √85/-6, what is the value for cos⁴θ - 2sin²θ + cot³θ, as a decimal?
Log On
Question 1167664: If θ is an angle in the second quadrant and secθ = √85/-6, what is the value for cos⁴θ - 2sin²θ + cot³θ, as a decimal? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! If θ is an angle in the second quadrant and secθ = √85/-6, what is the value for cos⁴θ - 2sin²θ + cot³θ, as a decimal?
-------------------------
secθ = √85/-6
I'll assume it is
cos = -6/sqrt(85)
x = -6
r = sqrt(85)
----------------------
y = sqrt(r^2 - x^2)
---
sin = y/r
cot = cos/sin
etc
