Sec²A – Tan²A = 1 (SecA – TanA) (SecA + TanA) = 1 (SecA – TanA) (2√2 + 9) = 1 (SecA - TanA) = 1/(2√2 + 9) SecA – TanA = 9 - 2√2 ………………(i) SecA + TanA = 9 + 2√2 ……………… (ii) By solving the two equations we get, 2SecA = 18 SecA = 9 CosA = 1/9 Sin²A + Cos²A = 1 Sin²A + 1/81 = 1 Sin²A = 1 - 1/81 Sin²A = 80/81 SinA= (4√5)/9 SinA + CosA = (4√5)/9+ 1/9 SinA + CosA = (1+4√5)/9
Introducing a lady to her wife, a man said, “Her sister’s mother is the only daughter of my grandmother.” How is the man related to this lady? <...
How many male members are there in the family?
...W is the brother of C. B is the sister of I, who is the son of O. P is the daughter-in-law of C. I is married to P. C is not a male. How is W related to O?
. How is V related to U?
Who among the following person is the son of G?
Statements: T < U ≤ V = W ≤ S = Y < X = Z
Conclusions:
I. S > T
II. X ≥ U
How is O related to H?
How is J related to I?
How is uncle of S related to N?
How is K related to J?
