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bonufazy [111]
3 years ago
5

Cos t(sec t - cos t) simplify the expression

Mathematics
1 answer:
fiasKO [112]3 years ago
7 0
Remember:
sec t=1/cos t
sin²t+cos²t=1            ⇒sin²t=1-cos² t

Therefore: 
cos t(sec t- cost)=(cos t* sec t)- cos² t=(cos t * 1/cos t)-cos² t=1-cos²t=sin² t

Answer: cos t(sec t-cos t)=sin² t

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