show that tan(x)/sec2(x) = (1/2)sin(2x)

tan(x)/sec2(x) Sec(x) = 1/cos(x), therefore 1/sec(x) = cos(x). also tan(x) = sin(x)/cos(x).using substitution, tan(x)/sec2(x) = (sin(x)/cos(x)) * cos2(x) = sin(x)cos(x). sin(x+y) = sin(x)cos(y) + cos(x)sin(y). since 2x = x+x, sin(2x) = 2sin(x)cos(x). therefore, sin(x)cos(x) = (1/2)sin(2x)

OO
Answered by Olaitan O. Maths tutor

4474 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Integrate (x+2)/((x+5)(x-7)) using partial fractions between the limits 5 and -2, giving your answer to 3sf


Differentiate x^3+ x^2+2=y


Find the equation of a Circle with centre (2,9) and radius 4.


How do changes to the coefficient of x affect the graph y = f(x) as opposed to changes to the coefficient of f(x)?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences