If sec$\theta \backslash theta$ + tan$\theta \backslash theta$ = 3, then cos$\theta \backslash theta$ = ………

If x > y and $\frac{2xy}{x^2+y^2}\backslash frac\{2xy\}\{x^2+y^2\}$ = cos$\theta \backslash theta$, then sin$\theta \backslash theta$ = …………

In $\mathrm{△}ABC\backslash triangle\; ABC$, if BC = 3, CA = 4, AB = 5, then cos $\mathrm{\angle }BAC\backslash angle\; BAC$ =

$si{n}^{6}A+co{s}^{6}A+3si{n}^{2}Aco{s}^{2}A=sin^6\; A\; +\; cos^6\; A\; +\; 3sin^2\; A\; \backslash ,\; cos^2\; A\; =$

If sin$\theta \backslash theta$ . cos$\theta \backslash theta$  = $\frac{1}{2}\backslash frac\{1\}\{2\}$ , then $\theta \backslash theta$  = …………

If tan $\theta \backslash theta$ = $\frac{3}{4}\backslash frac\{3\}\{4\}$ , then the value of $\frac{1-cos\theta }{1+cos\theta }=\backslash frac\{1-cos\; \backslash theta\}\{1+cos\backslash theta\}\; =$

If A, B and C are interior angles of a triangle ABC, then tan ($\frac{A+B}{2}\backslash frac\{A+B\}\{2\}$ ) =

If cos A = $\frac{12}{13}\backslash frac\{12\}\{13\}$ , then sin A =

$\frac{sin30^{\circ }+tan45^{\circ }-cosec60^{\circ }}{cot45^{\circ }+cos60^{\circ }-sec30^{\circ }}=\backslash frac\{sin30^\backslash circ\; +\; tan45^\backslash circ\; -\; cosec60^\backslash circ\}\; \{cot45^\backslash circ\; +\; cos60^\backslash circ\; -\; sec30^\backslash circ\}\; =$

$si{n}^{2}sin^2$ $30^{\circ }30^\backslash circ$, $si{n}^{2}sin^2$ $45^{\circ }45^\backslash circ$ and $si{n}^{2}sin^2$ $60^{\circ }60^\backslash circ$ are in