Chia LC

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Questions

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Given that sin x + sin y = a and cos x + cos y =a, where a not equal to 0, express sin x + cos x in terms of a. attemp: sin x = a - sin y cos x = a - cos y sin x + cos x = 2A - (sin y + cos y)
9 years ago

Answers

The following answers were posted by visitors named Chia LC.