Answer:
-
Step-by-step explanation:
using the half angle formula
cos( ) = ±
cos195° = cos(180 + 15)° = - cos15°
then
cos15° = cos ( ) = = = =
then
cos195° = - cos15° = -
Answer:
A
Step-by-step explanation:
The simpler way to calculate this question is just to calculate A and B
A - 4 x (7+2) = 4 x 9 = 36
B - (4 x 7) + 2 = 28 + 2 = 30
A = 36
=> Thus, our answer is A
<u>Hope this helps!</u>
The answer is 3/17
Explanation:
12+12+3=27
44-27=17
therefore students studing art = 17
as students studing art & biology = 3
the answer is 3/17
hope this helps :)
The answer would be 6 and 2