Johnyi said:Homework Statement
Cos(Tan^-1(x))
Homework Equations
The Attempt at a Solution
Dont know how drawing a right triangle would do anything, don't know what to plug in.
To draw a right triangle, you will need a ruler, a protractor, and a pencil. Start by drawing a horizontal line for one side of the triangle. Then, using your protractor, draw a perpendicular line from one end of the horizontal line to create a 90-degree angle. Finally, use your ruler to connect the two endpoints of the lines to complete the right triangle.
The first step is to identify the given expression and determine if it is a trigonometric function, such as sine, cosine, or tangent. Next, draw a right triangle and label the sides according to the given expression. Then, use the Pythagorean theorem and trigonometric identities to simplify the expression. Finally, substitute the values of the sides back into the original expression to get the simplified form.
Yes, drawing a right triangle and using the Pythagorean theorem and trigonometric identities can help simplify complicated expressions involving trigonometric functions. It allows us to visualize the relationship between the sides of a right triangle and use that information to simplify the expression.
Yes, there are some shortcuts you can use to draw a right triangle. For example, if the given expression involves sine or cosine, you can draw a triangle with a hypotenuse of 1 and use the values of the opposite and adjacent sides to simplify the expression. Additionally, if the expression involves tangent, you can draw a triangle with a leg of 1 and use the values of the opposite and adjacent sides to simplify the expression.
You can check your simplified expression by substituting the values of the sides of the right triangle back into the original expression and comparing it to the given expression. If both expressions are equal, then your simplified expression is correct. You can also use a calculator to evaluate both expressions and compare the results.