Category: Trigonometry

Logarithmic Inequalities

In the previous articles, we already learned about linear inequalities, and quadratic inequalities. But there are still more types of inequalities. I’ll just discuss to you one, the logarithmic inequalities. The others will also...

Unit Circle

Unit circle is a circle with radius 1 unit. Thus, its name is a unit circle. This simplest circle is the foundation of six  functions in trigonometry namely sine, cosine, tangent, cotangent, cosecant and...

Solving Trigonometric Equations

To become an effective trigonometric equations solver, we need to know the basic trigonometric identities. I created a guideline below to follow so that it would be easy for you where to start solving...

Identity Index in Trigonometry

Here is the formula index in trigonometric identities. Again, identities are the fundamentals of trigonometry. This is the counterpart of four basic operations in arithmetic. Basic Identity

Cosine Law

Cosine law is a formula used to find the third of SAS triangle. A triangle with two sides given and an included angle. Solving problems that requires law of cosine as solution is easy to...

Extended Sine Law

Sine law is one of the easiest topics in trigonometry. It’s my job to make it more complicated for you to be challenged. Given a and Circle above. The following relation is called extended...