Find the Sum of sine series when angle are in AP

Find the Sum of Cosine series when angle are in AP

If first term is 8 and last term is 20 common difffence is 2. find the value of n when the series are in AP.

In a convex polygon the interior angles are in AP, the smallest angle being 120^circ and the common difference 2^circ . Find the sum of the sines of the interior angles of the polygon if sin 1^circ = lambda ..

If the length of sides of right angled triangle are in A.P., then the sines of the acute angles are

If the sides of a right angled triangle are in A.P then the sines of the acute angles are

If the sides of a right angled triangle are in A.P then the sines of the acute angles are

If the sides of a right angled triangle are in A.P then the sines of the acute angles are

If the sides of a right angled triangle are in A.P then the sines of the acute angles are

If the lengths of sides of right angled triangle are in A.P then the sines of the acute angles are