Find the value of cot x - tan x
1). 2cot 2x
2). sec x
3). cosec x
4). 3cot x
$(\cot x - \tan x = \;\frac{{\cos x}}{{\sin x}} - \frac{{\sin x}}{{\cos x}})$
= $(\frac{{co{s^2}x - si{n^2}x}}{{\sin x\;cos\;x}})$
= $(\frac{{2cos2x}}{{2\sin x\;cos\;x}})$
= $(2 \times \frac{{\cos 2x}}{{\sin 2x}} = 2\cot 2x)$
1. If sec 2A =1/sin13A, determine the angle A in degrees.
3. If $tan\alpha$ = $n tan\beta$ and $sin\alpha$ = $m sin\beta$ , then $cos^{2}\alpha$ is
4. What is the value of sec $\frac{-2π}{3}$ ?
6. $(cosA + sinA)^{2}+ (cosA - sinA)^{2}$ is equals to
7. A missile travels at 1116 km/h. How many metres does it travel in one second?
9. If secA + tanA = x, then find the value of x.
10. Sec²θ-tan²θ =