જો $x = \sin 130^\circ \cos 80^\circ$,$y = \sin 80^\circ \cos 130^\circ$,અને $z = 1 + xy$ હોય,તો નીચેનામાંથી કયું સાચું છે?

  • A
    $x > 0, y > 0, z > 0$
  • B
    $x > 0, y < 0, 0 < z < 1$
  • C
    $x > 0, y < 0, z > 1$
  • D
    $x < 0, y < 0, 0 < z < 1$

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જો $A+B=45^{\circ}$ અને $(\cot A-1)(\cot B-1)=4 K$ હોય,તો $K=$

જો $90^\circ < A < 180^\circ$ અને $\sin A = \frac{4}{5}$ હોય,તો $\tan \frac{A}{2}$ ની કિંમત શોધો.

$\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} = $

જો $\alpha, \beta, \gamma$ એ ધન સંખ્યાઓ એવી રીતે હોય કે $\alpha + \beta = \pi$ અને $\beta + \gamma = \alpha$,તો $\tan \alpha$ ની કિંમત શોધો - (જ્યાં $\gamma \neq n\pi, n \in I$)

$\frac{\sin 300^{\circ} \tan 240^{\circ} \sec \left(-420^{\circ}\right)}{\cot \left(-315^{\circ}\right) \cos \left(210^{\circ}\right) \operatorname{cosec}\left(-315^{\circ}\right)}$ નું મૂલ્ય શોધો.

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