10) A 20-ft ladder leans against a wall and make an angle of 78° with the ground. How high is the ladder reach up? How far away from the base of the wall is the ladder? Round the nearest tenth of a ft. 11) True or false. a) cos(90° – a) = sin (-a) b) sec-t) : = csc (t)

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter11: Introduction To Trigonometry
Section11.CT: Test
Problem 14CT: In a right triangle with acute of measures and , cos =ac. Find the following values in terms of the...
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10) A 20-ft ladder leans against a wall and make an angle of 78° with the ground. How high is the ladder
reach up? How far away from the base of the wall is the ladder? Round the nearest tenth of a ft.
11) True or false.
a) cos(90° - а) — sin (-а)
b) sec (- t) = csc (t)
Transcribed Image Text:10) A 20-ft ladder leans against a wall and make an angle of 78° with the ground. How high is the ladder reach up? How far away from the base of the wall is the ladder? Round the nearest tenth of a ft. 11) True or false. a) cos(90° - а) — sin (-а) b) sec (- t) = csc (t)
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