# Trig

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Rewrite tan 88 deg in terms of its cofunction

How does that end up????

• Trig -

Notice there are only 3 trig names
all have matching co-function
sine --- cosine
secan ---cosecant
tangent -- cotangent , so that

sinØ = cos(90°- Ø)
secØ = csc(90° - Ø)
tanØ = cot(90° - Ø)

so tan 88° = cot 2°

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