*First, as we know, the period of tangent is Not all functions can be solved exactly using only the unit circle.*When we must solve an equation involving an angle other than one of the special angles, we will need to use a calculator. Note that a calculator will only return an angle in quadrants I or II for the cosine function, since that is the range of the inverse cosine. So, we also need to find the measure of the angle in quadrant III.

*First, as we know, the period of tangent is Not all functions can be solved exactly using only the unit circle.When we must solve an equation involving an angle other than one of the special angles, we will need to use a calculator. Note that a calculator will only return an angle in quadrants I or II for the cosine function, since that is the range of the inverse cosine. So, we also need to find the measure of the angle in quadrant III.We read the equation from left to right, horizontally, like a sentence.*

The period of both the sine function and the cosine function is There are similar rules for indicating all possible solutions for the other trigonometric functions.

Solving trigonometric equations requires the same techniques as solving algebraic equations.

Identities are true for all values in the domain of the variable.

In this section, we begin our study of trigonometric equations to study real-world scenarios such as the finding the dimensions of the pyramids.

However, with trigonometric equations, we also have the advantage of using the identities we developed in the previous sections.

When we are given equations that involve only one of the six trigonometric functions, their solutions involve using algebraic techniques and the unit circle (see [link]).When we want to calculate the function for an angle larger than a full rotation of 360° (2 We can also find missing side lengths.The general rule is: When we know any 3 of the sides or angles we can find the other 3 (except for the three angles case) See Solving Triangles for more details.We can verify the solutions on the unit circle in [link] as well.While algebra can be used to solve a number of trigonometric equations, we can also use the fundamental identities because they make solving equations simpler.Notice that trigonometric equations that are in quadratic form can yield up to four solutions instead of the expected two that are found with quadratic equations.In this example, each solution (angle) corresponding to a positive sine value will yield two angles that would result in that value., which he developed by measuring the shadow of his staff.Based on proportions, this theory has applications in a number of areas, including fractal geometry, engineering, and architecture.Trigonometric equations are, as the name implies, equations that involve trigonometric functions.Similar in many ways to solving polynomial equations or rational equations, only specific values of the variable will be solutions, if there are solutions at all.

## Comments Trigonometry Solved Problems Trigonometric Equations

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