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The value of 3 sin 70° sec 20° + 2 sin 49° sec 51° is (1) 2 (2) 3 (3) 5 (4) 60°

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The value of 3 sin 70° sec 20° + 2 sin 49° sec 51° is 

(1) 2 

(2) 3 

(3) 5 

(4) 60°

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(3) 5

= 3 + 2 = 5

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