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Evaluate : (i) 3 cos 80^(@) "cosec 10"...

Evaluate :
(i) `3 cos 80^(@) "cosec 10"^(@) + 2 sin 59^(@) sec 31^(@)`
(ii) `(cos 70^(@))/(sin 20^(@)) + (cos 59^(@))/(sin 31^(@)) - 8 sin^(2) 30^(@)`
(iii) `"cosec" (65^(@) + A) - sec(25^(@) - A)`

Text Solution

Verified by Experts

The correct Answer is:
(i) 5
(ii) 0
(iii) 0
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