Given < A=-225°. (a) Determine the smallest positive coterminal angle
(b) Determine the reference angle
(c) Find the exact values of sin A, COS A, and tan A

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?