ALGEBRA 2/TRIGONOMETRY - JMap

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16 Which expression is equivalent to (nomop)(x), given m(x) = sin x, computations.
n(x) = 3x, and p(x) =x 2 ?
(1) sin(3x)2 (3) sin2(3x)
@ 3sinx2
(4) 3sin2x
17 The value of csc 138°23' rounded to four decimal places is
(1) -1.3376 (3) 1.5012
(2) ~ 1.3408 ®1.5057
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18 Which function is one-to-one?
(1) k(x) = x 2 + 2 -t- (3) f(x) = Ixl + 2
@ g(x) = x 3 + 2 I (4) j(x) = X4 + 2
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19 The conjugate of the complex ~ession -5x + 4i is
(1) 5x - 4i l0J-.5x - 4i
(2) 5x + 4i (4) -5x + 4i
20 What is a positive value of tan ~ x, when sin x = 0.8?
@ 0.5 (3) 0.33 (01) "- • b
(2) 0.4 (4) 0.25
fan -5 X ~ +;:~-~ ftt- ·S-
Algebra 2/frigonometry - June '12 [8]