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7 Prove the following identities 4 marks a Sinxtanx secx cosx b Cos x sinx 1 cosx 1 7-Prove the following identities. (4 marks) a-

7 Prove the following identities 4 marks a Sinxtanx secx cosx b Cos x sinx 1 cosx 1

7-Prove the following identities. (4 marks) a- Sinxtanx=secx-cosx b- Cos x+(sinx)2/(1+cosx) =1

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