Posted by **Nate** on Friday, May 16, 2008 at 5:08pm.

find the exact value for each function

tan pi/3

cos pi/4

- trig -
**Reiny**, Friday, May 16, 2008 at 5:23pm
pi/3 radians = 60º

so let's look at the 30,60, 90º right-angled triangle

the ratio of its sides is 1:√3:2

tan 60º = 1/√3

so tan pi/3 = 1/√3

in the same way pi/4 = 45º

consider the 45,45,90 triangle.

the ratio of its sides is 1:1:√2

take it from there.

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