$\frac{3 \cot 40°}{ an 50°} - \frac{1}{2} \cdot \frac{\cos 35°}{\sin 55°} = $ ________.

Question

$\frac{3 \cot 40°}{	an 50°} - \frac{1}{2} \cdot \frac{\cos 35°}{\sin 55°} = $ ________.

Accepted Answer

Step 1: $\cot 40° = 	an 50°$ and $\cos 35° = \sin 55°$. So $\frac{3 	imes 	an 50°}{	an 50°} - \frac{1}{2} 	imes \frac{\sin 55°}{\sin 55°} = 3 - \frac{1}{2} = \frac{5}{2}$

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