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The level of radioactivity in the soil is decreasing by a factor of 1/2 each month
Answer:
34°
Step-by-step explanation:
To figure out the angle of the said letter, we divide the outer angle by 2 to get the answer. Since the outer angle is 68°, half of that is 34°. I hope this helps. Please mark me the brainliest because I really need it. Thanks!
Answer:
11:10
Step-by-step explanation:
Let area of yellow square be x
Area of green square=x+0.21*x=1.21*x
Ration of side=(1.21x)^(1/2)/(x)^(1/2)=1.1=11/10.
Answered by Gauthmath
In the given you wrote -2, whereas it should be -2i
z = a + bi and in trigo form | z |.(cos Ф + i.sin Ф).
z = 0 -2i → | z |.(cos Ф + i.sin Ф)
Now let's calculate z:
z² = a²+b² → z² = 0² (-2.i)² → z = -2(i)² →z= -2(-1) → z = |2|
tan Ф = b/a = -2/0 → tan Ф → - ∞ ↔ Ф = -90° or Ф = 270°
then the - 2 I ↔ |2|(cos 270° + i.sin 270°)
