Answer:
1 ) sin 165°
2 ) cos 330°
3 ) Tan 157.5°
4 ) 
Step-by-step explanation:
1 )
Given expression is 
We know that 


So the first expression is sin (330/2)° =sin 165°
2 )
GIven expression is 
We know that 
So the result is cos 330°
3 )
Given expression is 
We know that 
Also we know that sin2x = 2sinxcosx
So The numerator becomes
. and the denominator becomes as 

So the result is Tan 157.5°
4 )
Given expression is 
We know that 

So the result is 
Answer:
1, -2, -5, -8
Step-by-step explanation:
(-3*x)-5
just do that i swear
Answer:
-3x-3 or -3(x+1)
Step-by-step explanation:
7-5x+2(x-5)
7-5x+2x-10
7-3x-10
-3x+7-10
-3x-3
If you would like to solve the equation a/b = c for b, you can do this using the following steps:
<span>a/b = c /*b
</span>a = c * b /c
b = a/c
The correct result would be <span>b = a/c.</span>