Question 957479
I need to solve this compound formula (exact solution): 
sec(π/3 - 5π/4) 
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= 1/[cos(pi/3 - 5pi/4)
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= 1/[cos(pi/3)*cos(5pi/4) - sin(pi/3)sin(5pi/4)]
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= 1/[(1/2)*(-sqrt(2)/2) - (sqrt(3)/2)*(-sqrt(2)/2)]
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= 1/[-sqrt(2)/4 + sqrt(6)/4]
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= 4/[sqrt(6)-sqrt(2)]
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= 4[sqrt(6)+sqrt(2)]/[6-2]
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= sqrt(6)+sqrt(2)
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Cheers,
Stan H.
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