Question

17) if cos a + 2cos ht cos c =2 then a, b, c are in​

Answer 1

Answer:

a, b and c are all 2

Step-by-step explanation:

Answer 2

Answer:

first a+2=2

then transposition of + is -

then 2-2=0

a=0

how to check

0+2=2

answer is two