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Math

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Evaluate

*Note - We have to find the exact value of these. That I know to do. For example sin5π/12 will be broken into sin (π/6) + (π/4)

So...
sin 5π/12
sin (π/6) + (π/4)
sin π/6 cos π/4 + cos π/6 sin π/4

I get all those steps. The part I am struggling with is breaking these into 2 simple ones.

a) sin 11π/12
b) cos 13π/12
c) tan (-7π/12)
d) tan (-5π/12)

  • Math -

    11 is 5 + 6

    -7 is -12 + 5
    -5 is -2 -3
    13 is 2 + 11, and 11 is above.

    Watch the algebra.

  • Math -

    5 and 6 over what?

    They have to either be over 3, 4, 6, or 2.

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