18 degree/ 36 degree and Continued proportion OF Sine and Cosine series||Conditional Identity

Continued Product OF sine || cosine series

Are 4,12,36 in continued proportion?

If 36, 54, x are in continued proportion, find the value of x.

If 27, 36, x are in continued proportion, find the value of x.

Continued Product OF sine || Continued Product OF cosine series

If x, 18, 108 are in the continued Proportion, find the value of x.

Half angle formula and illustration || Continued product OF Cosine series and examples

Use OF interval and illustration || Sin & Cos 18 degree , Sin & Cos 36 degree || Trigonometry identities with 3 angles and their derivation || Important Points

Summation OF trigonometric series different types ||Proving conditional identity