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Evaluate : sin 18°/cos 72° find the value and plizzzskqdnwk

 Evaluate :
 
sin 18°/cos 72°
 
 
find the value and plizzzskqdnwk

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

sin 18°/cos 72°
To simplify this,
convert the sin function into cos function
We know that,
18° is written as 90° - 72°,
sin 18°= cos 72°.
= sin (90° - 18°) /cos 72°
Substitute the value, to simplify this equation
= cos 72° /cos 72°
= 1

Thanks

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