GCSE Maths


Let's have a look at tan in action. Below is a simple right-angle triangle with a 45° angle marked. Remember "sohcahtoa"!
45-90-45 degree triangle

By definition , tan 45°


tan 45°

= opposite÷adjacent

= 3÷3

= 1

Tan 45° will always equal 1, but only applies to right angle triangles.

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