Question

Evaluate: sin18°/cos72°​

Answer 1

Answer:

sin18°/cos72°

= sin18°/sin18°

=1

Answer 2

1

Step-by-step explanation:

$to \: simplify \: this \: convert \: the \: </p><p></p><p>sin \: function \: into \: cos \: fuction \: \\ we \: know \: that \: 18° \: is \: written \: </p><p>as \: 90°-18° \: which \: is \: equal \: to \: the \: cos \: 72° \\ = \frac{sin(90°-18°)}{cos72°} \\ substitute \: the \: value \: to \: simplify \: this \: eqution \: \\ = \frac{cos72°}{cos72°} = 1$

I hope this help you