10. Prove the following trig identities. Show all of your steps for full marks. a) sec...

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10. Prove the following trig identities. Show all of your steps for full marks. a) sec cos 0+ sec 0 sin 0 = 1+tan (3 marks) sin x cos x sin x + = 1 b) tan x (3 marks) 10. Prove the following trig identities. Show all of your steps for full marks. a) sec cos 0+ sec 0 sin 0 = 1+tan (3 marks) sin x cos x sin x + = 1 b) tan x (3 marks)