Question
If sec 2A = sin2  60o  + sec
60o  - cos2 30 o , then find the value of (√3tan A + cot 2  A).Solution
sec 2A = sin 2  60 o  + sec 60 o  - cos 2  30 o
Or, sec 2A = (√3/2) 2  + sec 60 o  - (√3/2) 2
Or, sec 2A = sec 60 o
Or, 2A = 60
Or, 'A' = 30
So, required value = √3 x tan 30 o  + cot 2  30 o
= √3 x (1/√3) + (√3) 2 = 1 + 3 = 4
- Study the given pattern carefully and select the number that can replace the question mark [?] in it.
First row: 10, 6, 964
Second row: 7, 3... Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
3 _ 3 _ 5 3 3 5 _ 3 3...
UDGO : FWTL : : MXRC : ?
Find the missing number.
20, 30, 42, 56, 72, ?
Study the given pattern carefully and select the number that can replace the question mark [?] in it.
First row: 6, 5, 191
Second row: 9, ...
Select the related number from the given alternatives.
29 : 65 : : 43 : ?
- Study the given pattern carefully and select the number that can replace the question mark [?] in it.
First row: 11, 7, 1274
Second row: 9, ... Find the missing letter.
What will come in the place of question mark?
In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
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