Answer:
-i
Step-by-step explanation:
i^15
Divide the exponent by 4
15/4 = 3 r 3
Take the remainder and use as the exponent
i^3
We know that i^2 = -1
i^3 = i^2 *i
i^3 = -1*i
-i
4

This is because there is an imaginary 1 in front of the first sqrt.
Answer:
square root (50) = 7.071
Step-by-step explanation:
Using Pthagoras' theorem, the diagonal length is
.
Therefore, the diagonal length is the square root of 5^2+5^2,
= 
= 
= 7.071
Answer:
find the area if the sector,then the area of the triangle.After that, Subtract the area of the triangle from the area of the sector