Prove that `sin 55^circ - sin 19^circ + sin 53^circ - sin 17^circ = cos 1^circ`

Prove that sin 1^circ lt sin 1 .

Prove that tan 9^circ - tan 27^circ -tan 63^circ + tan 81^circ = 4 .

Prove that sin^(2) 12^circ + sin^(2)21^circ + sin^(2)39^circ + sin^(2)48^circ = 1 + sin^(2)9^circ + sin^(2)18^circ

Prove that tan 20^circ* tan 80^circ = sqrt3 tan 50^circ .

The value of ((sin(78^circ +θ) - cos (12^circ +θ) +(tan^(2)70^circ - cosec^(2)20^circ))/ (sin 25^circ cos 65^circ + cos 25^circ sin 65^circ) is: ((sin(78^circ +θ) - cos (12^circ +θ) +(tan^(2)70^circ - cosec^(2)20^circ))/ (sin 25^circ cos 65^circ + cos 25^circ sin 65^circ) का मान है :

The value of (tan 29^circ cot61^circ - cosec^2 61^circ) + (cot^2 54^circ - sec^2 36^circ) + (sin^2 1^circ + sin^2 3^circ + sin^2 5^circ +......+ sin^2 89^circ) is: (tan 29^circ cot61^circ - cosec261^circ) + cot254^circ - sec236^circ +(sin 21^circ + sin 23^circ + sin 25^circ +......+ sin 289^circ) का मान है :

In the following incomplete sentences fill in the blanks such that the resulting sentences become true. If sin 17^circ *sin 43^circ *sin 77^circ = lambda sin 51^circ then lambda is equal to

The numerical value of sin 6^circ* sin 42^circ* sin 66^circ* sin 78^circ =_____

tan 40^circ + 2tan 10^circ is equal to