यदि $\sin \theta = \frac{a}{b}$ दिया गया है,तो $\cos \theta$ का मान क्या होगा?

  • A
    $\frac{b}{\sqrt{b^{2}-a^{2}}}$
  • B
    $\frac{b}{a}$
  • C
    $\frac{a}{\sqrt{b^{2}-a^{2}}}$
  • D
    $\frac{\sqrt{b^{2}-a^{2}}}{b}$

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$\frac{1}{\cos ^{2} \theta}-\frac{1}{\cot ^{2} \theta} = \dots$

$\cos 35^{\circ} = \ldots \ldots \ldots$

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