Answer:
ok
Step-by-step explanation:
3
3 is the only number here with factors of itself (3) and 1
it should be : x²= 15²+8²
x²= 225+64
x²=289
x=√289
x=17
tan(A/2)
tan(A/2)=sinA/1+cos A
tan(A/2)= 5/13÷1+12/13
tanA/2=1/5