Question

$if \: sec \: = \: \frac{5}{4} \: show \: that \: \frac{2cos \: - \: sin}{cot \: - \: tan} = \: \frac{12}{7}$

Answer 1

just use the triangle , find the 3rd side and u will get all the ratios .....and hence u can prove it

this can help u...