Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Answer: D
Mathematics
You might also like to view...
A recursion formula and the initial term(s) of a sequence are given. Write out the first five terms of the sequence.a1 = 1, an+1 = 
A. 1, 
, 12, 
, 360
B. 1, 
, 
, 
, 
C. 1, 
, 
, 
, 
D. 1, 
, 
, 
, 
Mathematics
Simplify the rational expression.
A. 
B. a - b
C. 
D. a - 2b + 1
Mathematics
Provide an appropriate response.If the sides of a triangle measure 15 m, 18 m, and 22 m, what kind of triangle is it?
A. equilateral triangle B. right triangle C. scalene triangle D. isosceles triangle
Mathematics
Find the total annual premium. Use the fire insurance rate table. Rates are for each $100 of insurance.
Territorial Rating: 4Building Classification: BBuilding Replacement Cost: $184,000Contents Value: $120,000
A. $230.40 B. $2304.00 C. $1856.80 D. $2316.80
Mathematics