SSC CPO SI and ASI Model Paper 9

Question : 132 of 200

Marks: +1, -0

If cosx = siny, and 0° < x < 90°, then find the value of cosec(x + y).

Solution:

(4)

As 0° < x < 90°

∴ siny = sin(90°- x)

⇒x + y = 90°

∴cosec(x + y) = cosec 90° = 1

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