Question

prove that cos tita *sin 90 - tita +sin tita * cos 90 - tita =1​

Answer 1

sin(90-tita)=cos tita

cos(90-tita)=sin tita

therefore: (cos tita*cos tita)+(sin tita* sin tita)

cos^2 tita+sin^2 tita

which we know that it is equal to 1

cos^2 tita+sin^2 tita=1

pls mark brainlist