Answer:
-1/√2
Step-by-step explanation:
According to trigonometry identity
cos(A+B) = cosAcosB - sinA sinB
Given the expression
(cos92°)(cos133°)-(sin92°)(sin133°)
This can be expressed as cos(92+133) where A = 92, B = 133
(cos92°)(cos133°)-(sin92°)(sin133°)
= cos(92+133)
= cos225
= -0.7071
= -1/√2
Hence the exact value is -1/√2
First,multiply the -2 by everything in the brackets
so that's, -6x-(b-4x)+(x+6b)
then combine like terms
that's -6x-(7b-3x) which is
-3x-7b I believe
Answer:
B
Step-by-step explanation:
Answer:
4 1/2
Step-by-step explanation:
4 goes into 20 5 times, so 18 is two less. this means that 4 goes in 4 times, leaving 2/4 behind which is a 1/2.
Hope this helps
The real number has to be 0
