30 (i) the value of a (ii) sin 30
2
(b) If 2cos? x + sin x - 2 = 0 and 0° <x< 90°, find
(i) the value of x (ii) tan 2x
(iii) cosecx
(iii) 2 cos
.
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30 (i) the value of a (ii) sin 30
2
(b) If 2cos? x + sin x - 2 = 0 and 0° <x< 90°, find
(i) the value of x (ii) tan 2x
(iii) cosecx
(iii) 2 cos
.
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