Im receiving this output. In assembly x$86$ How do I fix the $-$nan

Please enter the length of the first side: $12\mathrm{.}0$

Please enter the length of the second side: $12\mathrm{.}0$

Please enter the size of the angle in degrees: $153\mathrm{.}0$

Thank you Erik Williams. You entered $12\mathrm{.}000000,12\mathrm{.}000000,$ and $153\mathrm{.}000000.$

The length of the third side is: $-$nan

The final time on the system clock is $23456789$ tics

Have a good day.

here is my code

segment text

two dq $2\mathrm{.}0$ ; Define a double $-$ precision floating $-$ point number with the value $2\mathrm{.}0$

pi dq $3\mathrm{.}141592653589793$

conversion$\_$factor dq $0\mathrm{.}017453292519943295$ ; $\backslash$pi $/180$

; Get user input and store in xmm$15$

push qword $0$

push qword $0$

mov rdi, format$\_$float

mov rsi, rsp

call scanf

movsd xmm$15,[$rsp$]$

pop rax

pop rax

; Ask for second side of triangle

mov rax, $0$

mov rdi, length$\_$second$\_$side

call printf

; Get user input and store in xmm$12$

push qword $0$

push qword $0$

mov rdi, format$\_$float

mov rsi, rsp

call scanf

movsd xmm$12,[$rsp$]$

pop rax

pop rax

; Ask for angle

mov rax, $0$

mov rdi, angle$\_$prompt

call printf

; Get user input and store in xmm$14$

push qword $0$

push qword $0$

mov rdi, format$\_$float

mov rsi, rsp

call scanf

movsd xmm$14,[$rsp$]$

pop rax

pop rax

; output newline

mov rdi, newline

call printf

; thank you input

mov rax, $3$

mov rdi, thank$\_$you$\_$input

mov rsi, user$\_$name

movq xmm$0,$ xmm$15$

movq xmm$1,$ xmm$12$

movq xmm$2,$ xmm$14$

call printf

; Get user input and store in xmm$11$

push qword $0$

push qword $0$

mov rdi, format$\_$float

mov rsi, rsp

movsd xmm$11,[$rsp$]$

pop rax

pop rax

movsd xmm$1,$ xmm$14$ ; Copy degrees into xmm$1$

mulsd xmm$1,$ qword $[$conversion$\_$factor$]$ ; xmm$1=$ degrees $*(\backslash$pi $/180)$

; Calculate a$^2$ and store in xmm$3$

movsd xmm$3,$ xmm$15$

mulsd xmm$3,$ xmm$3$

; Calculate b$^2$ and store in xmm$4$

movsd xmm$4,$ xmm$12$

mulsd xmm$4,$ xmm$4$

; Add a$^2$ and b$^2,$ result in xmm$3$

addsd xmm$3,$ xmm$4$

; Calculate $2$ab and temporarily store in xmm$4$

movsd xmm$4,$ xmm$15$

mulsd xmm$4,$ xmm$12$

mulsd xmm$4,$ qword$[$two$]$ ; $[$two$]$ should contain the double $-$ precision floating $-$ point value of $2\mathrm{.}0$

; Calculate $2$ab $*$ cos$(\backslash$theta $)$ and store in xmm$4$

mulsd xmm$4,$ xmm$14$

; Subtract the product from the sum of squares

subsd xmm$3,$ xmm$4$

; Take the square root of xmm$3$ to get the length of the third side

sqrtsd xmm$0,$ xmm$3$ ; The result is now in xmm$0$

mov rdi, fmt ; Format string for printf

mov rax, $1$ ; Indicate that $1$ floating $-$ point argument is passed

call printf ; Print the third side length

; Output newline

mov rdi, newline

call printf