Which expression is equivalent to sin 7pi/6?
a. sin pi/6
b. sin 5pi/6
c. sin 5pi/3
d. sin 11pi/6

Option: D

Step-by-step explanation:

To find the equivalent option,

= sin 210

= -0.5

Now, check for all the options, select the option which is equal to -0.5.

Check for option: D  

= sin 330

= -0.5

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752