Question

find the exact value of each of the remaining trigonometric functions of  θ .

cos θ = - 1/3,    π/2 <  θ < π

Answer 1

Step 1:

The equation is .

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Using Pythagoras theorem .

Step 2:

The lies in second quadrant. hence,  and  are positive, remaining are negative.

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Step 3:

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Solution:

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