જો $\sin x + \sin y = \frac{7}{5}$ અને $\cos x + \cos y = \frac{1}{5}$ હોય,તો $\sin(x + y)$ ની કિંમત શોધો.

  • A
    $\frac{7}{25}$
  • B
    $\frac{24}{25}$
  • C
    $\frac{-7}{25}$
  • D
    $\frac{-24}{25}$

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Similar Questions

$\cos 12^{\circ} \cdot \cos 24^{\circ} \cdot \cos 36^{\circ} \cdot \cos 48^{\circ} \cdot \cos 72^{\circ} \cdot \cos 84^{\circ} = $

જો $x = a \cos^3 \theta$ અને $y = b \sin^3 \theta$ હોય,તો:

ગુણાકાર $(1+\tan 1^{\circ})(1+\tan 2^{\circ})(1+\tan 3^{\circ}) \dots (1+\tan 45^{\circ})$ બરાબર શું થાય?

$0 < x \leq \pi$ માટે, $\sinh ^{-1}(\cot x)$ ની કિંમત શું થાય?

List-$I$ ની વસ્તુઓને List-$II$ ની વસ્તુઓ સાથે જોડો.
List-$I$List-$II$
$(I)$ $\sin^2 5^{\circ} + \sin^2 10^{\circ} + \sin^2 15^{\circ} + \dots + \sin^2 90^{\circ}$$(A)$ $0$
$(II)$ $\tan^2 5^{\circ} \cdot \tan^2 10^{\circ} \cdot \tan^2 15^{\circ} \dots \tan^2 85^{\circ}$$(B)$ $\frac{19}{2}$
$(III)$ $\cos^2 5^{\circ} + \cos^2 10^{\circ} + \cos^2 15^{\circ} + \dots + \cos^2 180^{\circ}$$(C)$ $18$
$(IV)$ $\cot 5^{\circ} + \cot 10^{\circ} + \cot 15^{\circ} + \dots + \cot 175^{\circ}$$(D)$ $1$
$(E)$ $-1$

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