જો $\frac{\sin^4 x}{2} + \frac{\cos^4 x}{3} = \frac{1}{5}$ હોય,તો $27 \sec^6 x + 8 \operatorname{cosec}^6 x = $

  • A
    $250$
  • B
    $125$
  • C
    $175$
  • D
    $350$

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જો $a \cos \theta + b \sin \theta = m$ અને $a \sin \theta - b \cos \theta = n$ હોય,તો ${a^2} + {b^2} = $

બધા જ શક્ય ત્રિપુટીઓ $(a_1, a_2, a_3)$ ની સંખ્યા શોધો જેથી તમામ $x$ માટે $a_1 + a_2 \cos 2x + a_3 \sin^2 x = 0$ થાય.

$n \in N$ માટે,જો $f(n) = (\cos nx)(\sec x)^n$ અને $g(n) = (\sin nx)(\sec x)^n$ હોય,તો $f(2020) - f(2019) + (\tan x)g(2019) =$

$\cot 18^{\circ} \cdot \cot 36^{\circ}+1=$

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