¿Cuál es el número que debe escribirse sobre la línea para que se cumpla la igualdad? 7 ∙ 3 + = - 4

The trigonometric ratios sine and secant are reciprocals of each other

I’m really confused and need your assist me with this question i’ve never been taught

Find the measure of angle y. round your answer to the nearest hundredth. ( type the numerical answer only) a right triangle is shown with one leg measuring 5 and another leg measuring 14. an angle across from the leg measuring 5 is marked y degrees. numerical answers expected!