(ii) 3 cos 80º.cosec 10°+2 cos 59° cosec 31°.
Sol 3 cos 80° cosec 10° +2 cos 59° cosec 31°​

1 thought on “(ii) 3 cos 80º.cosec 10°+2 cos 59° cosec 31°.<br />Sol 3 cos 80° cosec 10° +2 cos 59° cosec 31°​”

1. Answer:

   5

   Step-by-step explanation:

   Cose10=sec80

   Cos80.sec80=1

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