Question

cos C- CosD = __
a) 2 sin (*") sin(€"
c)2 cos(C)cos .
Vos – 2 sin (***)sin (3)
) - 2 cos(**) cos(;)
sin 7
-sin SA​

Answer 1

Step-by-step explanation:

this not correct question

tall me the correct question

Answer 2

Answer:

cosc-cosd=cosc/2×cosd/-sinc/2×sind/2