Question

prove that tan^2y-sin^2y=tan^2y×sin^2y​

Answer 1

Answer:

minus remove chess multiply chey

Answer 2

ᴛʜᴇ ᴛʀɪɢɴᴏᴍᴇᴛʀʏ

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies.