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Answer to Question #2711 in Trigonometry for Abhyuday singh

Question #2711
Show that:-<br>(i) sin 18° = (√5-1)/4 <br>(ii)Evaluate tan 11.¼°
Expert's answer
& i)
sin 18&deg;& = 0.309
(&radic;5-1)/4& = 0.309
ii) tan 11.&frac14;&deg;& = tan 11.25&deg;& = 0.20345

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