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[" Please prove - "],[sin20^(@)quad cos2...

[" Please prove - "],[sin20^(@)quad cos20^(@)],[sin70^(@)quad cos70^(@)]

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cos70^(@)+sin40^(@)=

cos70^(@)+sin40^(@)=

|["cos"70^(@), "sin"20^(@)], ["sin"70^(@), "cos"20^(@)]|=?

cos 70^(@) + sin 40^(@)=

sin 70^@ - cos 40^(@) =

Write the value of |[sin20^@-cos20^@ ],[sin70^@ cos70^@]| .

The value of (sin 20^(@) cos 70^(@)+sin70^(@) cos 20^(@) ) is ……….. .

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

(sin 70^(@) + cos 40^(@))/(cos 70^(@) + sin 40^(@))=

(sin 70^(@) + cos 40^(@))/(cos 70^(@) + sin 40^(@))=