સરવાળો શોધો: $\sin^2(3^{\circ}) + \sin^2(6^{\circ}) + \sin^2(9^{\circ}) + \dots + \sin^2(84^{\circ}) + \sin^2(87^{\circ}) + \sin^2(90^{\circ})$

  • A
    $\frac{31}{2}$
  • B
    $\frac{39}{2}$
  • C
    $\frac{59}{2}$
  • D
    $36$

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સમીકરણ $y = \sin \,x \sin \,(x + 2) - \sin^2 \,(x + 1)$ એ કયા ચરણમાં આવેલી સીધી રેખા દર્શાવે છે?

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જો $f(x) = \frac{\cot x}{1 + \cot x}$ અને $\alpha + \beta = \frac{5 \pi}{4}$ હોય,તો $f(\alpha) f(\beta)$ ની કિંમત શોધો.

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