Answer:
Step-by-step explanation:
(cos 4a*cos 2a+sin 4a*sin 2a)/sin 4a
=[cos (4a-2a)]/sin 4a
=(cos 2a)/sin 4a
=(cos 2a) /(2 sin 2a cos 2a)
=1/(2 sin 2a)
=1/2 csc 2a
Answer:
wsp, answer is 5,5 i'm pretty sure
Step-by-step explanation:
or its 0.5
Answer:
b=135
c=45
Step-by-step explanation:
On the 4th stage, 81 friends will be called to be told of the news
