(A) 4 (B) 3 (C) 2 (D) 0

sin23°cos67°+sec52°sin38°+cos23°sin67°+cosec52°cos38°cosec220°-tan270° = ?

Mathematics » Trigonometry

$\frac{\sin 23 ° \cos 67 ° + s e c 52 ° \sin 38 ° + \cos 23 ° \sin 67 ° + \cos e c 52 ° \cos 38 °}{\cos e c^{2} 20 ° - \tan^{2} 70 °}$ = ?