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निम्नलिखित का मान ज्ञात कीजिए । sec 70...

निम्नलिखित का मान ज्ञात कीजिए ।
`sec 70^(@) * sin 20^(@) - cos 20^(@) * cosec 70^(@)`

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Evalute (g) sec70^(@)sin20^(@)-cos70^(@)cosec20^(@)

sec70^(@)sin20^(@)+cos20^(@)"cosec"70^(@)=?

sec70^(@)sin20^(@)+cos20^(@)cosec70^(@)=2

Find sin 20^@ -cos 70^@ .

sec 70^@.sin 20^@ - cos70^@.cosec 20^@

The value of sec 70^@.sin 20^@ + cos 20^@.cosec 70^@ =………..