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Question: b determine od c determine the area of sector oabc...

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b) Determine OD. c) Determine the area of sector OABC. d) Determine the area of region ABCD. AD 0.37 d)simplify cos(n+x)cos(2+)-sin(31 ニ0.8oq 二0.8039 OD oD 3. Simplify cos(n-x) sec(nx) 4. If taniHX1-3tanl--х. find the value of tanx. 2 5. If cos0+sine, find the value of sin20. 1-V3 6. If cos θ + sin8-ins and cose-sin9-n-,find the value of sin2θ 6. If cose+sine-1t3 and cose-sine-1-3, find th 7. Simplify sins(그의-sin21 8 2 8 2 tanx+ tany+tanz-tanx tanytanz 1-tanxtany-tanxtanz-tanytanz 8. Prove that tan(x +y+z)- 9. Find the value of cos 1°+cos2+ cos3 +..+Cos 89+cos 90
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