Values of Some Important Trigonometric Angles | `15^@ and 75^@`

Some Important Trigonometric Formulae

Application Of Sum Of Some Important Trigonometric Series

Rules For Finding Trigonometric Ratio Of Angles Grater Than 90°|Some Important Trigonometric Formulae|Differentiation |Definition Of Differentiation |Geometrical Meaning Of Differentiation

Express sin67^@+cos75^@ in terms of trigonometric ratios of angles between 0^@ and 45^@

Express sin 75^(@) + cos 65^(@) in terms of trigonometric ratios of angles between 0^(@) and 45^(@) .

Express sin 67^@+cos 75^@ in terms of trigonometric ratios of angles between 0^@ and 45^@ .

Express cot 85^@ + cos 75^@ in terms of trigonometric ratios of angles between 0^@ and 45^@ .