# 15 Trigonometry Tutorials

These Trigonometry tutorials are written by experienced educators, all of whom also offer private tutoring lessons. Get the Trigonometry help you need, whether through these tutorials or through private tutoring lessons.

## Trig Ratios Posted by: Kisung Y on Mar 29, 2018

In trigonometry, it is important to know the trig ratios to help solve certain problems dealing with the matters of angles, equations, degrees, unit circle, etc. There are six trig ratios. Co-functions: sin=opp/hyp csc=1/(opp/hyp)=hyp/opp cos=adj/hyp sec=1/(adj/hyp)=hyp/adj tan=opp/adj cot=1/(opp/adj)=adj/hyp -Co-functions are trig ratios that are the inverses of SOH CAH TOA. -sin=sine -csc=cosecant -cos=cosine -sec=secant -tan=tangent…

## Unit Circle Posted by: Kisung Y on Mar 29, 2018

A unit circle is a circle with the radius of 1. A unit circle has radians, degrees, and coordinates.

## Radians into Degrees Posted by: Kisung Y on Mar 27, 2018

Most Algebra 2 Common Core Regents will have questions from the original Algebra 2 Regents exams, so it is beneficial to review them as well. One of the topics has to deal with radian measures.

## Trigonometric identities(Sin(alpha)&Cos(alpha)) Posted by: Irem B on Jan 25, 2018

Sin(alpha) sin(alpha)=y/r Basic rules of sin(alpha) -sin(alpha)=sin(-alpha) -> -alpha is alpha in inverse of rotation direction.So x value will stay same but y value will be negative of current y. in a triangle,there is a sine function rule with every angle of triangle.Lets say there is a triangle with alpha,beta and thita and the a,b…

## Prove the Pythagorean Identity sin^2(θ) + cos^2(θ) = 1 Posted by: Madeline K on Oct 17, 2017

There are three Pythagorean Identities, and you can get from one to the other with a little algebra magic. One of these identities is: sin^2(θ) + cos^2(θ) = 1. But how do we know that adding “sine of theta squared” plus “cosine of theta squared” truly equals one? (Fyi, sin^2(θ) is the same thing as…

## Degrees to Radians Posted by: Brooklyn M on Jul 25, 2017

A radian is an angle with its vertex at the center of a circle. In trigonometry, this maybe used as an alternative to measuring angles in degrees. To do this, you multiply the angle in degrees by pi and divide by 180.

## Solving Trigonometric Equations Part 2 Posted by: Darryl K on Jun 24, 2017

This is part 2 of 2 on Solving Trigonometric Equations (see Solving Trigonometric Equations Part 1 for problems 1 to 5). In this tutorial I will solve several different trigonometric equations using different techniques such as factoring, substitution and converting the equation to all one trigonometric function using identities. Solving trigonometric equations involves knowledge of…

## Solving Trigonometric Equations Part 1 Posted by: Darryl K on Jun 24, 2017

This tutorial is Part 1 of 2 on Solving Trigonometric Equations. In this tutorial I will solve several different trigonometric equations using different techniques such as factoring, substitution and converting the equation to all one trigonometric function using identities. Solving trigonometric equations involves knowledge of several mathematical concepts such as factoring techniques we learn in…

## Trig Identites Posted by: Ashley D on May 28, 2017

This problem uses trigonometric identities to solve. It was found in the Princeton Review’s Math Level 2 SAT Subject Test book.

## Algebra problem Posted by: Sophia S on May 05, 2017

x(2y-5)=y+4 in this question our goal is to factor everything to one side and figure out what y equals out to.

^