then deduce that
0<secX - tanX <(or equal to) 1
for values of x between 0 and pi/2
given that secX- tanX = 1/2
find exact value of X
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Originally Posted by pook help!!
i can help with your first question.
Multiply both sides by :
There's an identity:
Re-arrange that to:
Thus the left side side of becomes one and the proof is complete.
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