4
2√3
6
3√2
Correct answer is B
f:x→2tanx
g:x→√(x2+8)
(gof)=√((2tanx)2+8)
( g o f )(45º) = √((2 tan 45º)^2 + 8)
= √(4 + 8) = √12
= √(4 x 3)
∴ 2√3
Differentiate \frac{x}{x + 1} with respect to x. ...
If →PQ = -2i + 5j and →RQ = -i - 7j, find →PR ...
Express \frac{7\pi}{6} radians in degrees....
The gradient ofy= 3x^2 + 11x + 7 at P(x.y) is -1. Find the coordinates of P. ...
The table shows the mark obtained by students in a test. Marks 1 2 3 4 5 Frequency ...
If P = \begin {pmatrix} 2 & 3\\ -4 & 1 \end {pmatrix}, Q = \(\begin{pmat...
Solve: 3^{2x-2} - 28(3^{x-2}) + 3 = 0...
Marks 0 1 2 3 4 5 Number of candidates 6 4 8 10 9 3 The table abov...