Prove that the equation is an identity.cos (x + y) cos (x - y) = cos2 x cos2 y - sin2 x sin2 y
What will be an ideal response?
cos (x + y) cos (x - y) = (cos x cos y - sin x sin y)(cos x cos y + sin x sin y)
= 
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Determine whether or not the ordered pair is a solution of the linear equation.x + y = 10; (5, 6)
A. Yes B. No
Find the absolute maxima and minima of the function on the given domain.
on the closed triangular region bounded by the lines 
and 
A. Absolute maximum: 120 at 
absolute minimum: 0 at 
B. Absolute maximum: 81 at 
absolute minimum: 0 at 
C. Absolute maximum: 81 at 
absolute minimum: 36 at 
D. Absolute maximum: 120 at 
absolute minimum: 81 at 
Solve the equation.log5 (4x - 1) = log5 (2x + 3)
A. 1 B. 2 C. 2 D. No solution
Write standard notation for the number in the sentence.Don figured out that he had lived two billion, five hundred eighty-two million seconds.
A. 2,582,000,000,000 B. 2,582,000,000 C. 2,582,000 D. 2,000,582,000