જો $\sin x + \sin^2 x = 1$ હોય,તો $\cos^8 x + 2\cos^6 x + \cos^4 x = $

  • A
    $0$
  • B
    $-1$
  • C
    $2$
  • D
    $1$

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$\cos 52^\circ + \cos 68^\circ + \cos 172^\circ$ નું મૂલ્ય શું છે?

જો $x = \sec \theta + \tan \theta$ હોય,તો $x + \frac{1}{x} = $

જો $\tan x = \frac{b}{a}$ હોય,તો $\sqrt {\frac{{a + b}}{{a - b}}} + \sqrt {\frac{{a - b}}{{a + b}}} = $

$\frac{{\tan A + \sec A - 1}}{{\tan A - \sec A + 1}} = $

જો $\tan \theta = \frac{a}{b}$ હોય,તો $\frac{{\sin \theta }}{{{{\cos }^8}\theta }} + \frac{{\cos \theta }}{{{{\sin }^8}\theta }} = $

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