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3 years ago

Sin( X+Y ) = cos( X−Y ) = 1, find the value of X and Y.

Mathematics

1 answer:

iris [78.8K]3 years ago

7 0

answer x = 225 and y = -135

Step-by-step explanation:

x+y = 90 and x= 90-y and x -y = 360 so 90-y -y = 360

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Stephanie took a science exam that had two parts. Part 1: She got 16 questions correct, which was 45 of the number of part 1 que

nasty-shy [4]

Answer:

Step-by-step explanation:

Let x and y be the total number of questions in part 1 and part 2 exams respectively.

For part 1:

Number of correct question = 4/5 of the total number of question in part 1

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Number of corrected question = 2/3 of total number of question in part 2

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