ACT Math 4.4 Trigonometry
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ACT Math: Trigonometry Drill 4, Problem 4. What is the equation of the graph in the video?
| ACT Math | Trigonometry |
| ACT Mathematics | Trigonometry |
| Foreign Language | Arabic Subtitled Chinese Subtitled Korean Subtitled Spanish Subtitled |
| Geometry | Right Triangles and Trigonometry |
| Language | English Language |
| Product Type | ACT Math |
| Trigonometry | Graphing trigonometric functions SOHCAHTOA (values and properties of trig functions) Solving right triangles |
Transcript
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.