Q9. If sin 8 + cos 0 =y, and cos 0 - sin 0
= x, then x ² + y 2 is equal to
(a) 0
(b) 1/2
O (c) 1
(d) 2
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sin8 + cos0 = sin8 + 1 = x
cos0 - sin0 = 1 - 0 = 1
sin8² + 1 + 2sin8 + 1
= sin8² + 2(sin8 + 1)
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