# StudySquare

# Edexcel A-level Maths Differentiation of trigonometric functions

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Equations involving trigonometric functions can be differentiated using the basic rules of differentiation by using the following results: d(sinx)/dx = cosx, d(cosx)/dx = −sinx and d(tanx)/dx = sec²x.

Equations involving trigonometric reciprocals can be differentiated using the basic rules of differentiation by using the following results: d(cotx)/dx = −cosec²x, d(secx)/dx = secxtanx and d(cosecx)/dx = −cosecxcotx.

The Chain rule can be applied to differentiate equations involving trigonometric functions using the results of their derivatives.

All differentiation rules can be used with the results for the derivatives of trigonometric functions to differentiate equations involving trigonometric functions.

# 7

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Use the Chain rule to evaluate the derivative of y = cosec(15 − x⁴) at x = 1 in radians.

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