What is the value of sin 480.sec 420 + cos 480.cosec 420
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Explanation:
sin(450+30) sec (450-30) + cos (450+30) cosec (450-30)
cos 30 cosec 30 - sin 30 sec 30
√3/2 * 2 - 1/2* 2/√3
2/√3
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