When we should use sin° and cos° and tan° in application of trignometry
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How do you know when to use cos, sin, tan in trigonometry?
How do you know which to use when determining the height, angle of a triangle for example, using tan, sin and cos?
When is co...
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3 ANSWERS

Tamoor Riaz, A level maths student
Written 1 May 2016
Are you familiar with soh cah toa? Well this is how I determine it
Normally in trig problems they'll give you at least two of the angle, the hypotenuse, the opposite and the adjacent.
Look at the two things you have been given in the problem, for example if I have the hypotenuse and the angle, I can determine the opposite by sin (angle) x hypotenuse
Opp adj opp
Sin hyp cos hyp tan hyp
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OTHER ANSWERS

Gracie Murray, High school STEM student, avid lover of math
Written 27 Jun 2016
Cos= adjacent / hypotenuse
Sin= opposite / hypotenuse
Tan= opposite / adjacent
In order to find out which sides you have lengths for already, you need to look at where you angle degree is placed. In reference to your angle, that is how you figure out which side is your opposite, adjacent, or hypotenuse.
Your hypotenuse is your longest angle, and typically slanted when connected to your degree angle.
Your adjacent is across from your hypotenuse. It is “straight down” from where your angle degree is placed. (It is connected to your degree angle as well directly.)
Your opposite is typically across from your angle degree, on the complete other side. It is not connected all all directly to the angle degree.
Typically, you are given side lengths and have to determine if you use sin, cos, or tanget.
After you determine which sides you have, already (either your opposite, adjacent, or hypotenuse), then you can solve for the missing side
How do you know which to use when determining the height, angle of a triangle for example, using tan, sin and cos?
When is co...
More
3 ANSWERS

Tamoor Riaz, A level maths student
Written 1 May 2016
Are you familiar with soh cah toa? Well this is how I determine it
Normally in trig problems they'll give you at least two of the angle, the hypotenuse, the opposite and the adjacent.
Look at the two things you have been given in the problem, for example if I have the hypotenuse and the angle, I can determine the opposite by sin (angle) x hypotenuse
Opp adj opp
Sin hyp cos hyp tan hyp
300 Views · View Upvotes
Share
MORE ANSWERS BELOW. RELATED QUESTIONS
What are some useful ways to remember sin, cos, tan?
2,670 Views
Are sin, cos, and tan names of scientists?
479 Views
If Sin A = 3/5, and Cos A < 0, then Tan A =?
1,434 Views
How do I find the value of 43/243/2?
47,388 Views
What and when should I use cos or sin in formula of work?
847 Views
Why we use sin theta and cos theta in an angle?
2,412 Views
What are the uses for sin, cos and tan in real life?
7,153 Views
What are some ways to explain what the sin, cos and tan are?
2,975 Views
What is the purpose of the sin, cos and tan functions?
2,112 Views
Why do we use cos and sin with angle theta?
653 Views
What are the actual calculations behind sin, cos, and tan?
3,284 Views
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518 Views
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666 Views
How can you simplify cos6x+sin6xcos6x+sin6x to 1−3sin2xcos2x?1−3sin2xcos2x?
13,116 Views
How can you prove tan a = sin a / cos a?
3,517 Views
OTHER ANSWERS

Gracie Murray, High school STEM student, avid lover of math
Written 27 Jun 2016
Cos= adjacent / hypotenuse
Sin= opposite / hypotenuse
Tan= opposite / adjacent
In order to find out which sides you have lengths for already, you need to look at where you angle degree is placed. In reference to your angle, that is how you figure out which side is your opposite, adjacent, or hypotenuse.
Your hypotenuse is your longest angle, and typically slanted when connected to your degree angle.
Your adjacent is across from your hypotenuse. It is “straight down” from where your angle degree is placed. (It is connected to your degree angle as well directly.)
Your opposite is typically across from your angle degree, on the complete other side. It is not connected all all directly to the angle degree.
Typically, you are given side lengths and have to determine if you use sin, cos, or tanget.
After you determine which sides you have, already (either your opposite, adjacent, or hypotenuse), then you can solve for the missing side
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