The complex number -7i into trigonometric form is 7 (cos (90) + sin (90) i) and 3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)
<h3>What is a complex number?</h3>
It is defined as the number which can be written as x+iy where x is the real number or real part of the complex number and y is the imaginary part of the complex number and i is the iota which is nothing but a square root of -1.
We have a complex number shown in the picture:
-7i(3 + 3i)
= -7i
In trigonometric form:
z = 7 (cos (90) + sin (90) i)
= 3 + 3i
z = 4.2426 (cos (45) + sin (45) i)




=21-21i
After converting into the exponential form:

From part (b) and part (c) both results are the same.
Thus, the complex number -7i into trigonometric form is 7 (cos (90) + sin (90) i) and 3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)
Learn more about the complex number here:
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Answer:
1/18 or 0.05
Step-by-step explanation:
Answer:
- Annabella will save $4950.11 after 2 years.
Step-by-step explanation:
<h3>Given</h3>
- Periodic payment P = $200,
- Period t = 2 years,
- Number of compounds, monthly n = 12,
- Interest rate, r = 3.2% = 0.032.
<h3>To find</h3>
- Future value of saving, F
<h3>Solution</h3>
Use periodic compound formula:

Substitute the values and calculate:
rounded
Answer: 340
Step-by-step explanation:
1360 / 4 = 340