$\frac{1}{4} [\sqrt{3} \cos 23^\circ - \sin 23^\circ] = $

  • A
    $\cos 43^\circ$
  • B
    $\cos 7^\circ$
  • C
    $\cos 53^\circ$
  • D
    આમાંથી કોઈ નહીં

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જો $\sin \alpha = 1/\sqrt{5}$ અને $\sin \beta = 3/5$ હોય,તો $\beta - \alpha$ કયા અંતરાલમાં આવે છે?

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$\frac{\sin 3\theta + \sin 5\theta + \sin 7\theta + \sin 9\theta}{\cos 3\theta + \cos 5\theta + \cos 7\theta + \cos 9\theta} = $

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

જો $\tan \alpha = \frac{m}{m + 1}$ અને $\tan \beta = \frac{1}{2m + 1}$ હોય,તો $\alpha + \beta = $

સાબિત કરો કે $\frac{\cos 4x + \cos 3x + \cos 2x}{\sin 4x + \sin 3x + \sin 2x} = \cot 3x$.

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