Question

(1+ cos tita ) (1 -costita) product ​

Answer 1

Answer:

sin^2thita

Step-by-step explanation:

(1+ cos tita ) (1 -costita)

={(1-cos^2thita)} ,

[ in tha formula of (a-b) (a+b) =(a^2-b^2) ]

=sin^2thita ,[since (sin^2 thita+cos^2thita)=1,or,{(1-cos^2thita)} =sin^2thita]