Use a double-angle formula or a half-angle formula to simplify 2sin12cos12.

(a) sin 24
(b) cos 24
(c) sin12
(d) cos12
(e) none of these

(a) sin 24

Mathematics

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(22a3b4c2)/(11a4b2c2) =

a. 2ab2c b. 2ab-2c2 c. 2a-1b2 d. 2a7b6 e. 2ab2

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Provide an appropriate response.How many people were 21 years old?

A. 7 B. 6 C. 11 D. 9

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Write the product as a sum or difference containing only sines or cosines.cos  cos 

A. [cos(6?) - sin(5?)]
B. cos2(11?)
C. [cos(5?) + cos(6?)]
D. [cos(12?) - sin(10?)]

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Write the complex number in rectangular form using exact values if possible. Otherwise, round to one decimal place.5

A.  + i
B.  + i
C.  + i
D.  + i

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