Question

a)
Without using calculator or table
1
(a) cos 18°=1/4
√10+2/
$cos18degree = 1 \div 4 \sqrt{10 + 2 \sqrt{5} }$
​

Answer 1

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Scientific Calculator(v1.0.1)

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Alt Deg ^

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x2 x3 xy

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Clr ← ( )

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Introduction

This Scientific c_r can solve basic and advanced mathematical expressions. One of the key features of this c_r is its ability to provide step by step solutions for any complex problem, a desired feature for students.