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OpenStudy (ttop0816):
please helpppp! Evaluate -tan^2A + 1 + sec^2A. -1 0 1 2
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OpenStudy (luigi0210):
Use your trig identities
OpenStudy (luigi0210):
hint: \[\LARGE sec^2A-tan^2A=1\]
OpenStudy (luigi0210):
So.. \[\LARGE 1+1=?\]
OpenStudy (ttop0816):
2!
OpenStudy (luigi0210):
Exactly.
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