Show that the equation is an identity.tan(cos-1 x) = 
What will be an ideal response?
tan2? + 1 = sec2? is the Pythagorean Identity
So tan ? = 
= 
for 0 ? ? ? ?
Let ? = cos-1 x. Then tan(cos-1 x) = 
= 
= 
= 
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The most simplified form of the extended ratio 30° : 60° : 90° is 15 : 30 : 45.
Answer the following statement true (T) or false (F)
Find two sets of parametric equations for the given rectangular equation.y = 2x + 2
A. x = t, y = 2t + 2; x = t, y = 
+ 2
B. x = 2t, y = t + 2; x = 
, y = t + 2
C. x = t, y = 2t + 2; x = 2t, y = t + 2
D. x = t, y = 2t + 2; x = 
, y = t + 2
Write the number as a product of a real number and i. Simplify the radical expression.- 
A. 10i
B. -10i
C. 10
D. -10
Solve the problem. Round your answer, as needed.Doug and Inga can deliver 100 papers in 4 hours. How long would it take them to deliver 95 papers?
A. 4.8 hours B. 4.2 hours C. 380 hours D. 3.8 hours