The rule for converting sin into cos and vice versa is:
sin α = cos ( 90° - α ) or cos α = sin ( 90° - α )
In this case:
cos ( 6 x ) = sin ( 90° - 6 x )
sin ( 90° - 6 x ) = sin ( 3 x - 9°)
90° - 6 x = 3 x - 9°
90° + 9° = 3 x + 6 x
99° = 9 x
x = 99° : 9 = 11°
Answer: C ) x = 11°
Answer:
Step-by-step explanation:
Sum of first n terms = 243
<h3>
<em><u>a</u></em><em><u>)</u></em><em><u> </u></em><em><u>a+a+a+a+a+a</u></em></h3>
<em><u>=(a+a+a+a+a+a)</u></em>
<em><u>=</u></em><em><u> </u></em><em><u>6a</u></em>
<h3><em><u>b. 5x-4x+10x</u></em></h3>
<em><u>=(5x+−4x+10x)</u></em>
<em><u>=</u></em><em><u> </u></em><em><u>11x</u></em>
<h3><em><u>c. 9t+3t-6t</u></em></h3>
<em><u>=(9t+3t+−6t)</u></em>
<em><u>=</u></em><em><u> </u></em><em><u>6t</u></em>
<h3><em><u>d. -5j+11j+j</u></em></h3>
<em><u>=(−5j+11j+j)</u></em>
<em><u>=</u></em><em><u> </u></em><em><u>7j</u></em>
<h3 />
Answer:
20% increase
Step-by-step explanation:
Initial price: $2.25
New price: $2.70
Percentage=(new price - initial price)×100/(initial price)
p=(2.70-2.25)×100/2.25=45/2.25=20%
Answer:
There are many decimals between 2.10 and 2.11.
Examples:
2.101, 2.102, 2.103, 2.104, 2.105, 2.106, 2.107, 2.108, 2.109
You can choose 2 from these examples.
