ค่าของฟังก์ชันไซน์และฟังก์ชันโคไซน์

Front

sin⁡(π-α)=?

Back

sin⁡(π-α)=sin⁡α

Front

cos⁡(π-α)=?

Back

cos⁡(π-α)=-cos⁡α

Front

sin⁡(2nπ+α)=?

Back

sin⁡(2nπ+α)=sin⁡α

Front

cos⁡(2nπ+α)=?

Back

cos⁡(2nπ+α)=cos⁡α

Front

sin⁡(π+α)=?

Back

sin⁡(π+α)=-sinα

Front

cos⁡(π+α)=?

Back

cos⁡(π+α)=-cos⁡α

Front

sin⁡(2π-α)=?

Back

sin⁡(2π-α)=-sin⁡α

Front

cos⁡(2π-α)=?

Back

cos⁡(2π-α)=cos⁡α

Front

cos⁡(-θ)=?

Back

cos⁡(-θ)=cos⁡θ

Front

sin(-θ)=?

Back

sin(-θ)=-sin⁡θ