Verify the identity.cos (x - y) - cos (x + y) = 2 sin x sin 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) = 2 sin x sin y.
Mathematics
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Find the derivative of the function.h(x) = 
5
A. 5
4
B. 
C. 
4
D. -5
4
Mathematics
Find the value of s in the interval [0, ?/2] that makes the statement true. Round to four decimal places.cot s = 0.6921
A. 0.9654 B. 0.3178 C. 4.1070 D. 0.7470
Mathematics
Solve the problem.A small company sells stock for 7
dollars per share. How much will 296 shares cost?
A. 38
dollars
B. 259 dollars
C. 2257 dollars
D. 264 dollars
Mathematics
Translate the expression into a word phrase.3 + x
A. Three decreased by x B. x divided by three C. Three increased by x D. Three times x
Mathematics