Hi. Looking for help on another trig proof. Here's the problem. Prove that: sec^6x (secx.tanx) - sec^4x (secx.tanx) =sec^5x.tan^3x This one's got me baffled. Thanks in Advance, Mike Clemmons
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What have you tried? Can I suggest taking out as a common factor first on the LHS so The rest should be easy...
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