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" 4."sin^(2)50^(@)+sin^(2)40^(@)" an "41...

" 4."sin^(2)50^(@)+sin^(2)40^(@)" an "417" sill anfforts "

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sin^(2)50^@+cos^(2)50^@=?

sin ^ (2) 40 + sin ^ (2) 50

Evaluate: sin^(2)40^(@)-cos^(2)50^(@)

4cos^(3)40^(@)-3sin50^(@)=

2 sin 40^(@) sin 10^(@)=

Sin^(2)50^(@)+Sin^(2)70^(@)+Sin^(2)170^(@)=

sin ^2 50^@+cos ^2 50^@ =?

What is sin^2 50^@ + sin^2 40^@ equal to?

sin ^ (2) 17.50 + sin ^ (2) 72.50

If (4cos^(2)40^(@)-3)(3-4sin^(2)40^(@))=a+b cos20 then find the value of (a-b)