Chaana is reading a book that has 350 pages. chaana has read 70% of the book. how many pages has she read?

answer:

step-by-step explanation:

when x and y are complementary we have

sin x= sin (90-y) = cos y

thus the relationship is

sinx = cosy

given that a right triangle has adjacent side 5 m and opposite side 12 m.

hypotenuse can be calculated using pythagorean theorem

hypotenuse =

hence if x is the angle at the base,

sin x = 5/13 and cos y = 5/13

sin y = 12/13 and cos x = 12/13