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x+ 1/x = 2cosθ (x+ 1/x)³ = (2cosθ)³ x³+ 1/x³+ 3x × 1/x ×(x+ 1/x) = 8cos³θ x³+ 1/x³+ 3 ×2cosθ = 8cos³θ x³+ 1/x³ = 8cos³θ - 6cosθ x³+ 1/x³ = 2(4cos³θ-3cosθ) Using identity [4cos³θ-3cosθ=cos3θ] x³+ 1/x³ = 2cos3θ
B has two sons and one daughter. G and J are the two married sons of B. F is the son of G. I is the daughter of C. E is married to G. C is married to J....
How is G related to L?
How is M related to L?
C is the father of G, who is the grandson of R. W is the only daughter of R. R has only two children and only one of them is married. O is the mother-in...
P, F’s father, has a grandchild, Vartika is the mother of K who has a son N, but K is not the daughter. K has a brother. Vartika and P are married...
Who is husband of mother of Z?
Which of the following statement(s) is/are true?
Who is the grandmother of M?
How is P related to O?
How O related to Y?
