Answer:
Step-by-step explanation:
<u>Right Triangles</u>
Right triangles are those who have a right angle, i.e. 90°. The other two angles must sum 90° to complete the 180° which must sum the internal angles of a triangle.
The image shows a circle with two similar triangles FAD and EAD. We know they are congruent because they share the same height and have a base of the same value (as indicated by the ticks). The segment AD must be perpendicular to FE since it comes from the center of the circle. We can conclude 
is right, i.e. measures 90°.
We know 
, so the required angle 
must be 90°-48°=42°.
When more offspring than can survive are produced, it is called overproduction. Variation among these offspring exists. The offspring with variations more suited to their environments will be more likely to survive.
Answer:
How to choose which trig function to use based on an angle? I'm assuming that's simpler form of the question hehe
Step-by-step explanation:
pick an angle, and look at the sides that you HAVE
if you have the side opposite to the angle, and the hypotenuse of the triangle you use sine.
if you have the side adjacent to said angle, and the hypotenuse, you use cosine.
and if you don't have the hypotenuse, but you have the other two sides, you use tangent.
There is nothing to rationalize since there is no root in the denominator.
