Question
If sin(A + B) = 1/2 and cos(A + 2B) = 1/√2, where 0°
A, B < 90°, then find the value of tan(2A).Solution
sin(A + B) = 1/2
Or, sin(A + B) = sin 30°
Or, A + B = 30° -------- (I)
cos(A + 2B) = 1/√2
Or, cos(A + 2B) = cos 45°
Or, A + 2B = 45° -------- (II)
On solving 2 × equation I – equation II,
We get, 2A + 2B − A − 2B = 60° − 45°
Or, A = 15°
Required value = tan(2A) = tan(30°) = 1/√3
In the following question, select the odd letters from the given alternatives.
Unscramble the letters in the words given below and identify the odd word out.
Find the odd one out of the choices given therein.
Four numbers have been given, out of which three are alike in certain manner and one is different. Select the odd one.
Three of the following four letter-clusters pair are alike and one is different. Choose the odd one.
The question contains pairs of words that are related to each other in a certain way. Three of the following four word-pairs are alike as these have the...
Odd one out
Three of the following words are alike in a certain manner and one is different. Select the odd word out.
Four word-pairs have been given, out of which three are alike in some manner and one is different. Select the odd one.
Select the option in which the letters are not related in the same way.
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