Question
If cot x – tan x = 3/2, then what will be the value of
cot x + tan x?Solution
cot x – tan x = 3/2 ⇒ cot x – 1/cot x = 3/2 Using If x - 1/x = p, then x + 1/x = √(p2 + 4) ⇒ cot x + 1/cot x = √[(3/2)2 + 4] ⇒ cot x + 1/cot x = √(25/4) ⇒ cot x + 1/cot x = 5/2 ⇒ cot x + tan x = 5/2
In a relational database, which relationship allows multiple records in one table to be associated with multiple records in another table?
To remove all rows from a table without logging individual row deletions and without firing triggers, which command would you typically use?
A table is in 2NF (Second Normal Form) if it is in 1NF and:
Which SQL statement is used to remove all rows from a table without logging individual row deletions?
A data warehouse is primarily characterized by which of the following properties?
Which key uniquely identifies a record in a table?
Which of the following is true about ACID properties in DBMS?
Query optimization heuristic that “pushes selections down” improves:
Which of the following is used to enforce referential integrity?
Which normal form eliminates repeating groups by putting them into separate tables and connecting them through foreign keys?
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