ACT Math: Trigonometry Drill 4, Problem 4. What is the equation of the graph in the video?
|Foreign Language||Arabic Subtitled|
|Geometry||Right Triangles and Trigonometry|
|Product Type||ACT Math|
|Trigonometry||Graphing trigonometric functions|
SOHCAHTOA (values and properties of trig functions)
Solving right triangles
First we should find out length of the final side
by using the Pythagorean Theorem - A sqaured plus B squared equals C squared
we can determine that root 2 squared plus
X squared equals 2 squared. That's 2 plus x squared equals 4...
Subtract 2 from both sides and X squared equals 2.
Take the square root of both sides and X equals the square root of 2.
Awesome. That means we have an isosceles triangle where two sides are equal
better yet when two sides are equal that means that 2
angles are equal. Even better we already know that one angle is 90 degrees
since the triangle is a right triangle, which means
that the other two angles have to measure 45 degrees each
and we have our answer it's C.