(cosx/(secx-tanx)) = 1+senx
i dont know how to prove this! HELP ...?
1 answer:
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
cos(x) / ( sec(x) - tan(x) )
<span>= cos(x) / ( 1/cos(x) - sin(x)/cos(x) ) </span>
<span>= cos² (x) / ( 1 - sin(x) ) </span>
<span>= ( 1 - sin² (x) ) / ( 1 - sin(x) ) </span>
<span>= ( 1 - sin(x) ) ( 1 + sin(x) ) / ( 1 - sin(x) ) </span>
<span>= 1 + sin(x)</span>
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The answer I got was
0.25
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625000
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