| 4. यदि sin(x + y) = Cos [3(x + y)] हो, तो| tan2x+y)] � – InterviewSolution

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| 4. यदि sin(x + y) = Cos [3(x + y)] हो, तो| tan2x+y)] का मान क्या होगा? ।

Answer»

sin(x + y) = cos[3(x + y)]cos(90 - (x + y)) = cos[3(x + y)]90 - (x + y) = 3(x + y)4(x + y) = 902(x + y) = 45

Therefore,tan[2(x + y)] = tan 45° = 1

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