$\sin^2 5^\circ + \sin^2 10^\circ + \sin^2 15^\circ + \dots + \sin^2 85^\circ + \sin^2 90^\circ$ નું મૂલ્ય કેટલું થાય?

  • A
    $7$
  • B
    $8$
  • C
    $9$
  • D
    $9\frac{1}{2}$

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$\frac{\sin^3 \theta - \cos^3 \theta}{\sin \theta - \cos \theta} - \frac{\cos \theta}{\sqrt{1 + \cot^2 \theta}} - 2 \tan \theta \cot \theta = -1$ જો

જો $\tan \theta + \sec \theta = e^x$ હોય,તો $\cos \theta$ ની કિંમત શું થાય?

જો $\alpha$ બીજા ચરણમાં હોય,તો $\sqrt{\frac{1-\sin \alpha}{1+\sin \alpha}}-\sqrt{\frac{1+\sin \alpha}{1-\sin \alpha}}=$

જો $\operatorname{cosec} \theta + \cot \theta = p$ હોય,તો $\cos \theta =$

જો $A, B, C$ એ ત્રિકોણના ખૂણાઓ હોય,તો $\sum \frac{\cot A + \cot B}{\tan A + \tan B} = $

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