Arccos(-x) = -Arccosx for –1<x<1
Please select the best answer from the choices provided

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

Would love some on this! include step by step have a good day!

How many zeroes do we write when we write all the integers 1 to 243 in base 3?