16. Define imaginary no.
17. What is co-ordinate system?
18. What is trigonometric ratio?
19. Write the mathematical formula to find area of the segment of the circle making an angle of θ
20. Write the formula to find area of triangle if its vertices are A (1, 1
)
(2, 2
)
( 3,3 )
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Answer:
number that is expressed in terms of the square root of a negative number (usually the square root of −1, represented by i or j ).
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