Refer to right triangle ABC with 
. Solve for all the missing parts using the given information.
?
inches, 
inches
?
Round the answers for the angles to two decimal places, and for the side, to one decimal place.
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
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Verify the identity.sec 
= -csc x
What will be an ideal response?
Solve the problem.A plane flying at an altitude of 20,000 feet descends 2000 feet four times before ascending 1000 feet. What is the current altitude of the plane?
A. 11,000 ft B. 27,000 ft C. 12,000 ft D. 13,000 ft
Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = 6 B. x = 0 C. x = -6 D. none
State whether the function is continuous at the indicated point. If it is not continuous, tell why.f(x) = 
; x = 4
A. Not continuous; 
f(x) and f(4) exist but 
f(x) ? f(4)
B. Not continuous; 
f(x) exists but f(4) does not exist
C. Not continuous; f(4) does not exist and 
f(x) does not exist
D. Continuous