Mr.Bell gave out a science test last week to six honors students. The scores were 88, 94, 80, 79, 74, and 83. What is the standa
1 answer:
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Starting with:
First, the difference of 2 squares shows that
Sub that in and multiply both sides by
:
This easily simplifies to
See if you can continue from here. If not, leave a comment and I or someone else can show you the rest.
First, the difference of 2 squares shows that
Sub that in and multiply both sides by
This easily simplifies to
See if you can continue from here. If not, leave a comment and I or someone else can show you the rest.
Solution:
As we know reference angle is smallest angle between terminal side and X axis.
As cosine 45 ° is always positive in first and fourth quadrant.
i.e CosФ, Cos (-Ф) or Cos(2π - Ф) have same value.
As, Cos 45°, Cos (-45°) or Cos ( 360° - 45°)= Cos 315°are same.
So, Angles that share the same Cosine value as Cos 45° have same terminal sides will be in Quadrant IV having value Either Cos (-45°) or Cos (315°).
Also, Cos 45° = Sin 45° or Sin 135° i.e terminal side in first Quadrant or second Quadrant.
