
Question 8 
 Given that sin x = 0.6 and 0o ≤ × ≤ 90o, evaluate 2 cos x + 3 sin x, leaving your answer in the form , where m and n are integers.
(b)
In the diagram, a semicircle WXYZ with centre O is inscribed in an isosceles triangle ABC. If AC =BC, OC = 30 cm and AĈB = 130o, calculate, correct to one decimal place, the
 radius of the circle;
 area of the shaded portion.
(Take π = )

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