Prove the following identity
cos^3a cos3a+sin^3a sin3a=cos^3 2a

18a

step-by-step explanation:

simply because it is. it's the highest common factor

answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

13664

step-by-step explanation:

=cross multiply

=100 x = 13664