*Thus, 1° = 60′, 1′ = 60″ Some of the angles whose measures are 360°,180°, 270°, 420°, – 30°, – 420° are shown in Radian Measure: There is another unit for measurement of an angle, called the radian measure.*Angle subtended at the centre by an arc of length 1 unit in a unit circle (circle of radius 1 unit) is said to have a measure of 1 radian.The original ray is called the initial side and the final position of the ray after rotation is called the terminal side of the angle. If the direction of rotation is anticlockwise, the angle is said to be positive and if the direction of rotation is clockwise, then the angle is negative The measure of an angle is the amount of rotation performed to get the terminal side from the initial side. For example, we can say that a rapidly spinning wheel is making an angle of say 15 revolution per second.

A degree is divided into 60 minutes, and a minute is divided into 60 seconds .

One sixtieth of a degree is called a minute, written as 1′, and one sixtieth of a minute is called a second, written as 1″.

In the meantime, If you follow only half of these tricks you will see a dramatic change in your performance and effectiveness.

We do our best to make fresh, easy-to-understand and helpful manuals that will help you better understand math, literature, biology, history, physics, chemistry and geometry assignments.

In the We know that the circumference of a circle of radius 1 unit is 2π.

## Tricks To Solve Trigonometry Problems

Thus, one complete revolution of the initial side subtends an angle of 2π radian.In earlier classes, we have studied the trigonometric ratios of acute angles as the ratio of the sides of a right angled triangle.We have also studied the trigonometric identities and application of trigonometric ratios in solving the problems related to heights and distances.It takes 12 minutes for the angle of depression to change from 30 to 45, how soon after this, will the car reach the building?In the books, you may have seen a big table containing values of sin cos tan cosec sec and cot for 0, 30, 45, 60 and 90 angles. You don’t have to start on one side of the equation and plow your way forward, you can work both ends then meet someplace in the middle. Like difference of squares, sometimes things cancel out. Turn tan and sec and cot and csc all into sin and cos. We’re so used to seeing (sinx)^2 (cosx)^2 then substituting a 1, we forget that the equals sign goes both ways. As you can see that the tricks and tips mentioned above are highly sufficient, and many users have found them to be pretty effective in solving trigonometric solutions quickly and correctly.If you have a trick which is not mentioned here, do tell us about it.Trigonometry is one of the most interesting subjects in Algebra and is also one of the easiest subject to score full marks in.However, unlike conventional mathematics and algebra trigonometry doesn't require too much logic instead you just need to focus on memorizing some important formulas and have some rationale in your reasoning.

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