Ques:-48. In the given figure, AOB is a diameter and DC is parallel to AB. If angle CAB =x degree --

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ques:-48. In the given figure, AOB is a diameter and DC is parallel to AB. If angle CAB = x deg find (in terms of x) the values of:
(i) angle COB

(ii) angle DOC

(iii) angle DAC

(iv) angle ADC
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