Answer:
Step-by-step explanation:
To simplify this expression you must use the following trigonometric identities
I
II
Remember that
Only if for all x
If f(x) is not greater than 0 for all x then
Now we have the expression:
then using the trigonometric identities I and II we have to:
is not greater or equal than 0 for all x. So.
Finally
Answer:
a=8, -8
Step-by-step explanation:
a^2-15=49
a^2=49+15
a^2=64
a=sqrt(64)
a=8, -8
Remove decimal for 4 move other decimal over once to the right and divide like normal
Answer:
36/21 (simplified)
Step-by-step explanation:
To use KCF, multiply by the reciprocal. 16/21 x 9/4
Just flip the denominator with the numerator