सिद्ध करें कि
`sin^(2)20^(@)+sin^(2)70^(@)=1`

What is sin^(2)20^(@)+sin^(2)70^(@) equal to ?

Show that sin^2 20^@+sin^2 70^@=1

Find the value of sin^(2)20^(@)+sin^(2)70^(@)

sin^(2)20^@+sin^(2)70^@-tan^2 45^@ =?

(7sin ^ (2) 30 ^ (@) + 3cos ec ^ (2) 60 ^ (@) - cot ^ (2) 45 ^ (@)) / (sin ^ (2) 70 ^ (@) + sin ^ (2) 20 ^ (@)) + 2sin ^ (2) 30 ^ (@) - 2cos ^ (2) 30 ^ (@) 20

Without using trigonometric tables,evaluate each of the following: (sin^(2)20^(@)+sin^(2)70^(@))/(cos^(2)20^(0)+cos^(2)70^(@))+(sin(90^(@)-theta)sin theta)/(tan theta)+(cos(90^(@)-theta)cos theta)/(cot theta)+cos(40^(0)+theta)-sin(50^(@)-theta)+(cos^(2)40^(0)+cos^(2)50^(@))/(sin^(2)40^(0)+sin^(2)50^(@))

Find the value of : 3 sin^(2) 20^(@) - 2 tan^(2) 45^(@) + 3 sin^(2) 70^(@) .

(sin^(2) 20^(@) + sin^(2) 70^(@))/(cos^(2) 20^(@) + cos^(2) 70^(@)) + [ (sin (90^(@) - theta).sin theta)/(tan theta) + (cos (90^(@) - theta).cos theta)/(cot theta) ] .

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

Find (1)/(2)cosec10^(@)-2sin70^(@) .