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We know that, (a + b) 2 = a2 + b2 + 2ab
So, (tan θ + cot θ) 2 = tan2 θ + cot2 θ + 2 x tan θ x cot θ
So, 162 = tan2 θ + cot2 θ + (2 x 1)
So, tan2 θ + cot2 θ = 256 - 2 = 254
In a certain code language, ‘OBLIGATE’ is coded as ‘QNAKICVG’. What is the code for ‘DOCUMENT’ in the same code language?
...If D = 4 and NEWS = 61, then LOWER =
Pointing to the photograph of a boy, Lakshmi said, “He is my father’s sister’s husband’s daughter’s brother.” How is that boy in photograph ...
Select the option that is related to the first number in the same way as the third number is related to the fourth number.
729: ? :: 432: 408<...
'A & B’ means ‘A is the sister of B’.
‘A – B’ means ‘A is the mother of B’.
‘A × B’ means ‘A is the husband of B’...
Taka : Bangladesh :: Lira : ?
If point P is exactly in the middle of points Y and R, then what is the direction of point S with respect to point P?
What is the total distance between point X and point T?
Statements:
All blacks are white.
Only a few whites are red.
No red is yellow.
Conclusions:
I). Some whites...
Which letter-cluster will replace the question mark (?) in the following series?
QFU, TLD, ?, ZXV, CDE
