Question
If cos θ + sec θ = √2, then the value of cos³ θ+
sec³ θ is:Solution
cos θ + sec θ = √2 cos³ θ+ sec³ θ = (cos θ + sec θ)3 - 3 ×cos θ × sec θ (cos θ + sec θ) = (√2)3 - 3× cos θ×1/ cos θ (√2) =2√2 -3√2 = -√2
Five friends G, H, I, J and K are sitting in a straight line all facing in the north direction. G is sitting at one of the extreme ends. Three people ar...
Which of the following statement(s) is/are true?
I. F and A are immediate neighbors
II. Only one person sits between K and T when counted ...
Who sits immediate left of Q?
If L sits second to the left of O then how many seats are between L and R when counted from the right of R?
Eight persons S, T, U, V, W, X, Y, and Z are sitting around a circular table facing the centre. W is not the neighbour of V or X. T is second to the lef...
L sits _____ to the left of K.
Who sits opposite to F?
How many persons are sitting around the circular table?
Who is sitting exact opposite to person S?
Four of them following are in the same group, which is not belongs to that group?
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