यदि $A = \cos^2 \theta + \sin^4 \theta$ है,तो $\theta$ के सभी मानों के लिए:

  • A
    $1 \le A \le 2$
  • B
    $13/16 \le A \le 1$
  • C
    $3/4 \le A \le 13/16$
  • D
    $3/4 \le A \le 1$

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यदि $\frac{\sin A - \sin C}{\cos C - \cos A} = \cot B$ है,तो $A, B, C$ किसमें हैं?

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