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ECAT and MCAT Preparation: Post your doubts here!

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If Z1 = 1 + i and Z2 = 2 + 3i , then |Z2 - Z1| = ?

My answer is root 5
but the book says its (root 3) i

I dont get it, probably the book is wrong here... :confused:

The answer is (root3) i I think your supposing i^2 as +1 , where as it's -1
 
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What is the circular measure of the angle b/w the hands of a watch at 4 O'clock?

No other length is given
there are 12 divisions in a clock. The total angle is 360 degrees...
so 360/12 = 30 degrees -> 1 division of a clock...
in 4 o clock, there are 4 divisions of a clock....
so 4 * 30 = 120 degrees, or you can count 120 degrees too...
so... is the answer correct?? :D
 
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there are 12 divisions in a clock. The total angle is 360 degrees...
so 360/12 = 30 degrees -> 1 division of a clock...
in 4 o clock, there are 4 divisions of a clock....
so 4 * 30 = 120 degrees, or you can count 120 degrees too...
so... is the answer correct?? :D

yes you're correct, it occured to me to solve this way, but i thought the question was related to the retarded fsc concept of sexagesimal measures of angles
 
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Without using a table or calculator, find the values sin and cos for the following

i. 18
ii. 36
iii 54
iv 72

this isn't properly explained in fsc book :/
 
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What is a lower bound and an upper bound of a set??
Q) Let A be the set consisting of -10, -5, 8, -1/3, 15, 21.
Find;
a) an upper bound of A;
b) a lower bound of A...
 
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