જો $\sin x + \sin y = \frac{1}{2}$ અને $\cos x + \cos y = 1$ હોય,તો $\tan(x + y) = $

  • A
    $\frac{8}{3}$
  • B
    $-\frac{3}{4}$
  • C
    $-\frac{8}{3}$
  • D
    $\frac{4}{3}$

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સાબિત કરો કે $\frac{\cos 7x + \cos 5x}{\sin 7x - \sin 5x} = \cot x$.

જો $\cot \alpha = \frac{1}{2}$ અને $\sec \beta = -\frac{5}{3}$,જ્યાં $\alpha \in \left(\pi, \frac{3\pi}{2}\right)$ અને $\beta \in \left(\frac{\pi}{2}, \pi\right)$ હોય,તો $\tan(\alpha + \beta)$ ની કિંમત શોધો.

$\cos 105^\circ + \sin 105^\circ$ નું મૂલ્ય શું છે?

$\cos^2 48^{\circ} - \sin^2 12^{\circ}$ ની કિંમત શોધો,જો $\sin 18^{\circ} = \frac{\sqrt{5}-1}{4}$ હોય.

સાબિત કરો કે $\frac{\sin x+\sin 3x}{\cos x+\cos 3x} = \tan 2x$.

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