If anyone doesn't get trigonometry here are some ways to help remember through picture memory.
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Mathematics, 20.04.2020 20:18 rileydavidharless
If anyone doesn't get trigonometry here are some ways to help remember through picture memory.
If anyone has a picture that's different please describe it as your answer with the calculation that helps you remember away from usual way.
Picture 1. Right angle
Sunrise Ah looks for side measure.
The number above is the hypotenuse
A/H = cos ( ) x hyp =base
A/H = cos ( ) x hyp = side
Picture 2.
Sunrise Soh looks for side measure.
The number above it is the hypotenuse
O/H = sin ( ) =p (for product) take the p x hyp.
Picture 3 Sunrise Toast (oa) looks for side measure = O/A
Tan ( lower angle ) x base = side
Picture 4
Side of car with window as hypotenuse.
Two wheels are the 2 angles given and the back seat is perpendicular to both wheels = so the triangle structure looks like this /00|7
so you type in 7/sin ( 1st wheel) x (2nd wheel) = hypotenuse.
Both angles given or worked out this is when this is used.
Picture 5
Electric mast looking for slope
SIN =S/P = O/A
Angle at top
We have the side at 70 and looking for the slope
Sin( top angle) = p then side/p = hyp
Picture 6
Top angle and base given creates a T this means half both of them before dividing.
Half = 1/2 base / sin (1/2) = hypotenuse
Picture 7
Top angle and base given creates a T this means half both of them before dividing.
To find height =
Half = 1/2 base /Tan 1/2) = Triangle height.
Key checker after pictures are drawn is;
sunrise = low angle x side or low angle x base = hypotenuse.
car = backseat x wheels = hypotenuse
Half = 1/2 base / sin (1/2) = hypotenuse
Half = 1/2 base / tan (1/2) = height
Just take care with top angle and lower angle key words in the drawing descriptions and then the pictures will help.
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