Pls give me the right answer

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with