1.Show that the following is true: (sin 30°)2 + (cos 30°)2 = 1
2.For 120°, show that tan T = sin T/cos T
3.Prove the following identities: cotT sinT = cosTsin2T sec2T = sec2T - 1
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(1) & (2) : What are you have troubles with? Simply calculate them.
(3) (i) Use the fact that:
(ii) Use the fact that: and that
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