**How to Use the sine cosine & tangent trigonometric functions**

You need to use the inverses of sin,cos and tan. These can be usually be found above sin, cos and tan onyour calculator and are sin -1 , cos -1 and tan -1. Here's another worked example.... Learn to find the sine, cosine, and tangent of 45-45-90 triangles and also 30-60-90 triangles. Until now, we have used the calculator to evaluate the sine, cosine, and tangent of an angle. However, it is possible to evaluate the trig functions for certain angles without using a calculator.

**How to Use the sine cosine & tangent trigonometric functions**

27/08/2016Â Â· Sin(x) increases as x increases from 0 to 90 and cos(x) decreases. If you look at the mechanical situation (whatever it happens to be), it is vey often possible to decide whether the effect increases or decreases with the angle and that will (can) give you an inkling about which function to use.... when to use sine vs cosine vs tangent. Ask Question 3. I'm a little confused about how you choose to use either sine or cosine or tangent over the others. Are they interchangeable given the same information you have about a right triangle? What are the circumstances that should dictate the use of one over the other? Or is it preference? If you know the sides you can work out the angles. If you

**Cosine Function Problems (solutions examples videos)**

27/08/2016Â Â· Sin(x) increases as x increases from 0 to 90 and cos(x) decreases. If you look at the mechanical situation (whatever it happens to be), it is vey often possible to decide whether the effect increases or decreases with the angle and that will (can) give you an inkling about which function to use.... 1) On the TI-86 calculator, you would enter the number of degrees in the keypad, then push the SIN key for the sine of that angle, or the COS key for the cosine of the angle, or the TAN key for the tangent â€¦

**How do you know whether to use sin cos or tan in a 90**

You draw the right angled triangle. You mark you angle. You mark the 3 sides as opp,adj,hyp. you put you side lengths in the right places. And then you use the ratio (sin , tan cos) that fits with the sides that you need to use.... Secant, cosecant and cotangent, almost always written as sec, cosec and cot are trigonometric functions like sin, cos and tan. sec x = 1

## How To Know Whether To Use Sin Cos Or Tan

### Understanding when to use sine and cosine to find x and y

- How to determine whether it is tan or sin or cos in
- Mechanics 1 Resolving Forces When to use Sin / Cos
- How to Use the sine cosine & tangent trigonometric functions
- How to know the Sine Cosine or Tangent of angles

## How To Know Whether To Use Sin Cos Or Tan

### 22/05/1999Â Â· tan(x) = 12/5 = 2.4 Let's say that we know only one side of the triangle but that we know the angle as well: + /| / / / / / / c 12 / / / / 30 90| +-----a-----+ Here we can find the lengths of either side. - If we use the equation for the sine of x, then when we put the angle and the opposite side's length in we get sin(30) = 12/c, and after rearranging we would get c = 12

- Some of them are cot x = 1/tanx , six x/cos x = tan x, sin(900-x) - cos x and so on. Excel offers a number of built-in functions that deal with trigonometry. You can use these trig functions to solve complex trigonometric expressions.
- sin 2 A + cos 2 A = 1 Both sinA and cosA must be numbers smaller than 1, for the adjacent and opposite sides of a triangle are always shorter than the side across from the 90Â° angle (called the hypotenuse , a word dear to the lovers of jokes and puns).
- You draw the right angled triangle. You mark you angle. You mark the 3 sides as opp,adj,hyp. you put you side lengths in the right places. And then you use the ratio (sin , tan cos) that fits with the sides that you need to use.
- Sine or Cosine? - Which Do You Use? In Physics some quantities are at angles and require the use of sine or cosine to solve. For some situations the

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