Question

show that cos28° cos52° - sin38° sin52°=0
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Answer 1

Answer:

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Step-by-step explanation:

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=> cos 38* cos 52* - sin 38* sin 52*

=> cos 38* cos ( 90* - 38* ) - sin 38* sin ( 90* - 38 * )

=> cos 38* sin 38* - sin 38* cos 38*

=> 0

Hope it helps...