Which expression is equivalent to sin(pi/12) cos(7pi/12) - cos(pi/12) sin(7pi/12)? O Cos(-pi/2)
O sin(-pi/2)
O cos(2pi/3)
O sin(2pi/3)

step-by-step explanation:

hjkj

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3

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