જો $a \sin \theta = b \cos \theta$,જ્યાં $a, b \neq 0$,તો $a \cos 2 \theta + b \sin 2 \theta = $

  • A
    $ab$
  • B
    $a$
  • C
    $b$
  • D
    $\frac{a}{b}$

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જો $\tan A < 0$ અને $\tan 2A = -\frac{4}{3}$ હોય,તો $\cos 6A =$

જો $3 \sin x + 4 \cos x = 5$ હોય,તો $6 \tan \frac{x}{2} - 9 \tan^2 \frac{x}{2}$ ની કિંમત શોધો.

$\tan \frac{\pi}{8}$ ની કિંમત શોધો.

જો $\cosh(x) = \frac{5}{4}$ હોય,તો $\cosh(3x)$ ની કિંમત કેટલી થાય?

$\cos ^4 \frac{\pi}{8}+\cos ^4 \frac{3 \pi}{8}+\cos ^4 \frac{5 \pi}{8}+\cos ^4 \frac{7 \pi}{8}=$

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