Could you maybe add more info? like a story or something
From my knowledge, I know that cos(30) = ((2)^(1/2))/2, therefore 9cos(30) = 9((2)^(1/2))/2
Answer:
D=12/2
Step-by-step explanation:
Let's simplify step-by-step.
2−v18−
2
/12
+2v18
=2+−v18+
−1
/6
+2v18
(−v18+2v18)+(2+
−1
/6
)
v18+
11
/6
D=Correcto
2-V^{18}-2/12+2V^{18}=12/2
v=1.082512
Now, notice the "tickmarks" on the angles, that means those two angles are equal, now if ∡ABC is 110, then the remaining is 70, 180 - 110, and if you subtract the 70 from 110, what's left is ∡DBC.