Report copyright - Services Education LLTtan10 tan20 tan45 tan70 tan80 ec 3. Evaluate: 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2sin 38 sec 52 sin 45 cos 57 tan 33 sec 54 cot 36 ec. 4. Express sin670 + cos750 in
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