Prove that the equation is an identity.sec3x cos x - sec2x sin2x = 1
What will be an ideal response?
sec3x cos x - sec2x sin2x = 
? cos x - 
? sin2x
= 
- 
= sec2x - tan2x
= 1 Pythagorean identity
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Find the linear approximating polynomial for the function centered at a.f(x) = 
, a = 0
A. L(x) = 
x
B. L(x) = 
x
C. L(x) = - 
x
D. L(x) = - 
x
Solve.An object is 30 feet from a lens with a focal length of 5 feet. What will be the image's distance from the lens? Round the answer to the nearest tenth if necessary. Use the following formula which describes how the image of an object is affected by a lens where o represents the object's distance from the lens, i represents the image's distance from the lens, and f represents the focal length of the lens. 
+ 
= 
A. 35 ft B. 6 ft C. 4.3 ft D. 25 ft
Factor the polynomial.x2 + 7x - 60
A. (x - 12)(x + 5) B. (x - 12)(x + 1) C. (x + 12)(x - 5) D. prime
Consider the functions 
and 
.
?
Find 
.
?
A. 
B. 
C. 
D. 
E. 