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cos(10^0)dot(cos 20^0)dotcos(40^0)= " " ...

`cos(10^0)dot(cos 20^0)dotcos(40^0)=` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` `"` 1. `1/8cot10^0` 2. `(1)/8t a n 10^0` 3. `1/4sec(10^0)` 4. `1/4cos e c(10^0)`

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RESONANCE DPP ENGLISH-JEE MAINS-All Questions
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