How to solve trigonometric equations

Simple notes, easy ways to remember the difference between the three (sin, cos and tan)

AQA C2

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  • Created on: 30-04-12 22:01
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Solving trigonometric equations - C2
Sin - two rows:
Find X
Do 180 - X = X1
Now do ±360 on X and X1
Remember to divide by the coefficient of x or
Cos - two rows:
find X
Your second value is -X
Now do ±360 on X and -X
Remember to divide by the coefficient of x or
Tan - one row:
find X
Do ±180
Now do ±360 on X and X1
Remember to divide by the coefficient of x or
Remember:
X = principal value
Circle the answers you get that are within your range and remember to
divide if you need to.

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