Evaluate: `|a+i b c+i d-c+i d a-i b|`

Write the value of |a+i b c+i d-c+i d a-i b| .

Evaluate the following determinants: |x-7x5x+1| (ii) |costheta-sinthetasinthetacostheta| |cos15^0sin15^0sin75^0cos75^0| (iv) |a+i b c+i d-c+i d a-i b|

If A=[[a+i b, c+i d],[-c+i d, a-i b]]a n da^2+b^2+c^2+d^2=1,t h e nA^(-1) is equal to a.[[a+i b,-c+i d],[-c+i d, a-i b]] b. [[a-i b,-c-i d],[-c-i d, a+i b]] c. [[a+i b,-c-i d],[-c+i d, a-i b]] d. none of these

"If A"= ({:(2, 3),(5, 1):}), B = ({:(a, b),(c, d):}) and AB = -13I, then find the value of a + b - c + d. (a) 5 (b) 3 (c) 2 (d) 1

Find the value of ( i^2 + i^4 + i^6 + i^7 ) / ( 1 + i^2 + i^3 ) is ( a ) 1 - i ( b ) 1 + i ( c ) 2 - i ( d ) 2 + i

The mean of a ,\ b ,\ c ,\ d\ a n d\ e\ i s\ 28. If the mean of a ,\ c ,\ a n d\ e\ i s\ 24 , what is the mean of b\ a n d\ d ? 31 (b) 32 (c) 33 (d) 34

(a) a- i ,b-iii,c-ii (b) a-iii,b-ii,c- i (c) a-ii,b-iii,c- i (d) a-ii,b- i ,c-iii