The value of cos 2 17-sin 2 73- is

The correct option is B 0cos2 17o = cos2(90o 73o) = sin2 73o Substituting the value cos2 17o – sin2 73o = 0 ...

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Standard Values of Trigonometric Ratios

The value of ...

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The value of cos² 17^o– sin² 73^o is

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\frac{1}{3}

{cos}^{2} 17 - {sin}^{2} 73 =

\frac{s i n^{2} 63^{\circ} + s i n^{2} 27^{\circ}}{c o s^{2} 17^{\circ} + c o s^{2} 73^{\circ}}

{cos}^{2} 17 - {sin}^{2} 17

\frac{(\sin^{2} 73 ° + \sin^{2} 17 °)}{(\cos^{2} 28 ° + \cos^{2} 62 °)} = 1 .

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