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find the exact value for each function

tan pi/3

cos pi/4

  • trig -

    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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