The video tutorial covers the derivation of trigonometric functions from scratch, including sine, cosine, tangent, cotangent, secant, and cosecant. It explains the use of the definition of derivatives, the quotient rule, and the power rule, along with the application of co-function identities. The tutorial emphasizes the importance of understanding limits and the chain rule in calculus.

What is the main focus of the video tutorial?

• Derivatives of inverse trigonometric functions

• Limits of trigonometric functions

• Derivatives of all trigonometric functions

• Integration of trigonometric functions

Which identity is used to break apart sine of x plus h?

• Double angle identity

• Angle sum identity

• Half angle identity

• Pythagorean identity

Why can't L'Hôpital's rule be used in the derivation of sine's derivative?

• The function is not continuous

• The derivative of sine is unknown

• The function is not differentiable

• The limit does not exist

What is the derivative of sine x?

• Secant x

• Tangent x

• Cosine x

• Sine x

What identity is used to derive the derivative of cosine?

• Angle sum identity

• Pythagorean identity

• Double angle identity

• Co-function identity

What rule is applied to find the derivative of tangent?

• Product rule

• Power rule

• Chain rule

• Quotient rule

What is the derivative of tangent x?

• Cotangent squared x

• Tangent squared x

• Cosecant squared x

• Secant squared x

Which rule is used to derive the derivative of secant?

• Product rule

• Quotient rule

• Chain rule

• Power rule

What is the derivative of secant x?

• Secant x times cotangent x

• Tangent x times cotangent x

• Cosecant x times cotangent x

• Secant x times tangent x

What is the derivative of cotangent x?

• Negative secant squared x

• Tangent squared x

• Negative cosecant squared x

• Secant squared x