Question

find the value tan (-315) ​

Answer 1

360-45=315

tan(-®)=. --tan(®)

so tan(-315)= --tan(315)

= --tan(360-45)=--(--tan(45))

since tan(360-®)= --tan(®)

so -(--tan(45))=+tan(45)=+1

Answer 2

the value tan(-315) is 1