By Team Aakash Byju's
Trigonometry establishes the relationships between the sides and angles of a right-angled triangle.
Triangle is a flat geometric figure that has three sides and three angle.
In trignometry θ is defined by an angle measured from x-axis in anticlockwise direction. Finding the x-coordinate of a given angle is called 'Cosine'.
If the angle is θ, then finding the respective cosine is referred as cosine θ or cos θ . The value of cos ranges from 1 to 1.
Similarly, Finding the y-coordinate of a given angle is called 'sine'. If the angle is θ, then finding the respective cosine is referred as 'sine θ' or 'sin θ'.
Continued..
Trigonometric Ratio:Ratio of sides of the triangle is called 'Trignometric Ratio'. Diagram and explaination of Sinθ, Cosθ, Tanθ, Cotθ, Cosecθ, Secθ:
Sides are always labelled with respect to the ‘θ’ being considered. Trignometric values for 0,30,45,60,90, are:
Trigonometric Ratios of Complementary Angles:
Trigonometric Identities: