My niece is staying the weekend with me and is stuck on #10, can anyone help me explain this her?!

sin / in simplest radical az+b2 = cz - 32 +62 -72 - 9 + 62 = 49 + 9 +9 III 561 = 158 b = 158 9. If angle a has a positive sine value and a negative cosine value, which quadrant must its terminal ray lie in? Explain how you came to your conclusion. [3 points] ( - ,+ ) ( + , + ) S A Quadrant III ( - 1 - ) T C ( + , - ) 10. Explain why sin 3 TT 2 / 2700 is equal to -1. Only an explanation that relies on the definition of the sine function will be given credit. [3 points] bblow COMMON CORE ALGEBRA II, UNIT #11 - THE CIRCULAR FUNCTIONS MATHINSTRUCTION, RED HOOK, NY 12571, 2017