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Trigonometrical Ratios and Identities - ETEA Model Test MCQS - Part - XXIX

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  • Trigonometrical Ratios and Identities - ETEA Model Test MCQS - Part - XXIX

    The value of $\cos A-\sin A$ when $A=\frac{5\pi }{4},$ is
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  • #2
    The value of $\cos (270{}^\circ +\theta )\,\cos (90{}^\circ -\theta )-\sin (270{}^\circ -\theta )\,\cos \theta $ is
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    • #3
      If $\cos (\alpha -\beta )=1$ and $\cos (\alpha +\beta )=\frac{1}{e}$ , $-\pi <\alpha ,\beta <\pi $ , then total number of ordered pair of $(\alpha ,\beta )$ is
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