If cos x-cos 60-cos 30-sin 60-sin 30- then the value of x is

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Standard Values of Trigonometric Ratios

If cos x=cos ...

Question

If cos x = cos 60^o cos 30^o + sin 60^o sin 30^o, then the value of x is

15^o

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45^o

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30^o

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60^o

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Solution

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Similar questions

(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}

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

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

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

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

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