# 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°& = 0.309

(√5-1)/4& = 0.309

ii) tan 11.¼°& = tan 11.25°& = 0.20345

sin 18°& = 0.309

(√5-1)/4& = 0.309

ii) tan 11.¼°& = tan 11.25°& = 0.20345

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