જો $x \sin^3 \alpha + y \cos^3 \alpha = \sin \alpha \cos \alpha$ અને $x \sin \alpha - y \cos \alpha = 0$ હોય,તો $x^2 + y^2 = $

  • A
    $-1$
  • B
    $\pm 1$
  • C
    $1$
  • D
    આમાંથી કોઈ નહીં

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જો $A + B + C = \frac{3\pi}{2}$ હોય,તો $\cos 2A + \cos 2B + \cos 2C = $

જો $\cos (\alpha + \beta ) = \frac{4}{5}, \sin (\alpha - \beta ) = \frac{5}{13}$ અને $\alpha, \beta$ એ $0$ અને $\frac{\pi}{4}$ ની વચ્ચે હોય,તો $\tan 2\alpha = $

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

$\frac{\tan 70^\circ - \tan 20^\circ}{\tan 50^\circ}$ નું મૂલ્ય શોધો.

${\tan ^2}\theta + {\cot ^2}\theta$ ની કિંમત શું છે?

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