What is the value of cos [(180 – θ)/2] cos [(180 – 9θ)/2] + sin [(180 – 3θ)/2] sin [(180 – 13θ)/2]?
Sin θ/ 2 . sin9 θ / 2 + cos3 θ / 2 . cos13 θ / 2 Use these two formula :- 2 sin A sin B = cos(A – B) – cos(A + B) 2 cos A cos B = cos(A + B) + cos(A – B) = [cos4 θ – cos5 θ + cos8 θ + cos5 θ] / 2 = (cos4 θ + cos8 θ) / 2 = 2 cos6 θ . cos2 θ / 2 = cos6 θ . cos2 θ Put θ = 00 0 + 1 = 1 Cos6 θ . cos2 θ = 1
If each of the letters in the English alphabet is assigned odd numerical value beginning A= 1, B = 3 and so on, what will be the total value of the lett...
Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter cluster.
...Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
WUW, TSV, QQU, NOT, ?
If the sequence of the English alphabet is reversed then which letter is 8th to the left of the second vowel from the right of English alphab...
Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.
k_Imml_mk_mmk_Ikkl_m
If the given words are arranged in the order as they would appear in the English dictionary from left to right, which of the following will be the secon...
Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.
_SWWS_WWWS_SWWWW_SSS
In the word ‘MARSHMALLOW’ all consonants are written as their preceding letter and all vowels are written as their following letters. Now all letter...
How many letters are there in the English alphabetical order between the first letter of the second word from the left and the second letter of the firs...
Three of the following letter-clusters are alike in some manner and hence form a group. Which letter-cluster does not belong to that group?
