This question is from trigonometry topic -trigonometric ratios on complementary angles in which we have to express the following in terms of T-ratios of angles lying between 0° and 45°:
sec78° + cosec56°
RS Aggarwal, Class 10, chapter 12, question no 8(iii)
sec78°+cosec56°
=sec(90−12°)+cosec(90°−34°)
=cosec12°+sec34°