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What is the value of tan y if (sin y + cos y)/ (sin y - cos y) = 3

A1

B1/√3

C1/2

D2

Answer:

D. 2

Read Explanation:

(sin y + cos y)/ (sin y - cos y) = 3 (tan y + 1)/ (tan y - 1) = 3 tan y + 1 = 3tan y - 3 tan y = 2

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Conert Radian to Degree :

7π4\frac{7\pi}{4}