Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identity
tanx = 
Consider the left side
← divide terms on numerator/denominator by cotA
= 
= 
= right side , thus proven
Only the upper-left statement is NOT true.
Estimate 285 as 300 and 11 as 10 so
we have 300 / 10 = 30
Its C
Answer:
-17/14
Step-by-step explanation:
To subtract fractions, you must have a common denominator. If that is not given, you make it.
You do so buy finding the LCM of denominators:
LCM of 7 and 2 = 14
Now, here you have multiplied the denominators either by 7 or 2. You do the same for the respective numerators:
2x2/14 - 3x7/14 = 4/14 - 21/14.
Now that you have the same denominator, subtract the numerators:
4-21 = - 17
Put it back as a fraction : -17/14
hope this helps.
Answer:
f(-2)=27
Step-by-step explanation:
Plug in -2 into x
f(-2)=2(-2)^2-8(-2)+3
f(-2)=8+16+3
f(-2)=27
