Answer:
see explanation
Step-by-step explanation:
Using sum to product identities
cos x - cos y = - 2sin(
)sin(
) = 2sin(
)sin(
)
cos x + cos y = 2cos(
)cos(
)
Note that
sin10° = sin(90 - 10)° = cos80°
Thus
← cancel 2 from numerator/ denominator
=
× 
= tan45° × tan35° { tan45° = 1 ]
= 1 × tan35°
= tan35° ← as required
Answer:

Step-by-step explanation:

First rule I'm going to use is the quotient rule:


Secondly, I'm going to rewrite the radical.


Third, I'm going to use the product rule on the first term:


Fourth, I'm going to use power rule for both of the last two terms:


Answer:
-2 and -6 is the correct answer
Answer:
1
Step-by-step explanation:
Let:
Vbu= Volume of the buret
Vbk= Volume of the beaker
A buret initially contains 70.00 millimeters of a solution and a beaker initially contains 20.00 ml of the solution the buret drips solution into the Beaker. each drip contains 0.05 mL of solution, therefore:
x = Number of drips
a = volume of each drip

after how many drips will the volume of the solution in the buret and beaker be equal ? Vbu = Vbk: