Current location - Training Enrollment Network - Mathematics courses - Senior high school mathematics compulsory 4 146 page 7 problem detailed explanation.
Senior high school mathematics compulsory 4 146 page 7 problem detailed explanation.
Hello LZ

Solution: The original title is cos (a+b) =1/5cos (a-b) = 3/5 to find tanatanb.

Cosa Cosb = 2/5 from Cosa Cosb-Sina sinb = 1/5 Cosa Cosb+Sina sinb = 3/5。

Sina sinb =- 1/5 ∴tanatanb=sinasinb/cosacosb=- 1/2

I'm happy to answer your question. I wish you progress in your study! The learning collection team will answer your questions.

You can ask questions if you don't understand! If you agree with my answer.

Please click the button below to choose the satisfactory answer, thank you!