State the trigonometric identities for sin2x, cos2x and tan2x
sin2x = 2sinxcosx cos2x = cos^2(x) - sin^2(x) tan2x = (2tanx)/(1-tan^2(x))
JS
Related Maths A Level answers
All answers ▸The equation of a circle is x^2-6x+y^2+4y=12. Complete the square to find the centre and radius of the circle.
What is the differential of (14x^3-3x^2)^3
Find the equation of the line tangential to the function f(x) = x^2+ 1/ (x+3) + 1/(x^4) at x =2
A triangle has sides A, B and C. The side BC has length 20cm, the angle ABC is 50 deg and angle BAC is 68 deg. a) Show that the length of AC is 16.5cm, correct to three significant figures. b) The midpoint of BC is M, hence find the length of AM