Arcsecant or arcsec or sec⁻¹ is an inverse trigonometric function. And many calculators don't have a key for them because they can be calculated with basic trigonometric functions like so:
sec⁻¹(x)=cos⁻¹(1/x).
So the correct answer is the fourth one: y=cos⁻¹(1/x).
I believe that the answer is 70. I hope I helped! The reason I say this is because BD is half of AE and 35+35=70 :)
Answer:
20/12
hope this helps
have a good day :)
Step-by-step explanation:
