Question

Answer fastly freinds I know many clevers are there . Plz answer this this is 7th Class question. Cos A . SinA = ? , No irrelevant answers. If any one give wrong answer it will be reported correct answer wull be marked as brainlist and who will will answer correct i will follow them and thank all their answers. Plz fast friends.
QUESTION IS :

COS A . SIN A = ?

ANSWER FAST PLZ.​

Answer 1

Answer:

cosA cosB + sinA sinB sin2 A + cos2 A = 1, sin 2A = 2 sinA cosA cos 2A = 2 cos2 A − 1=1 − 2 sin2 A 2 sinA cosB = sin(A + B) + sin(A − B) 2 cosA sinB = sin(A + B) − sin(A − B) 2 cosA cosB = cos(A + B) + cos(A − B) 2 sinA sinB = cos(A − B) − cos(A + B)

Step-by-step explanation:

mark as brainiest