If cos 2 x -cos 60-cos 30-sin 60-sin 30- then x is equal toA- 15-B- 60-C- 90-D- 30-

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Trigonometric Ratios of Compound Angles

If cos 2 x =c...

Question

If cos 2x = cos 60^o cos 30^o + sin 60^o sin 30^o then x is equal to

15^o

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60^o

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90^o

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30^o

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Similar questions

sin (60^{\circ} + 30^{\circ})

sin 60^{\circ} cos 30^{\circ} + sin 30^{\circ} cos 60^{\circ}

sin (60^{\circ} + 30^{\circ}) .

cos 2 x = cos 60^{\circ} cos 30^{\circ} + sin 60^{\circ} sin 30^{\circ}

(i) sin 60^{\circ} cos 30^{\circ} + cos 60^{\circ} sin 30^{\circ}

(i i) cos 30^{\circ} cos 60^{\circ} - sin 30^{\circ} sin 60^{\circ}

cos 60^{\circ} cos 30^{\circ} - sin 60^{\circ} sin 30^{\circ}

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