Skip to content

Course home

1.4.1 Trigonometry

Card 1 of 25

Which side is the hypotenuse in a right-angled triangle?

A

The longest side, opposite the right angle.

B

Every angle satisfies the identity sin⁡2θ+cos⁡2θ=1\boxed{\sin^2\theta+\cos^2\theta=1}sin2θ+cos2θ=1​.

C
  • sin⁡60∘=32\sin60^\circ=\frac{\sqrt3}{2}sin60∘=23​​
  • cos⁡60∘=12\cos60^\circ=\frac12cos60∘=21​
  • tan⁡60∘=3\tan60^\circ=\sqrt3tan60∘=3​
D

For an acute angle, cos⁡θ=\cos\theta=cosθ= adjacenthypotenuse\boxed{\frac{\text{adjacent}}{\text{hypotenuse}}}hypotenuseadjacent​​.

Card 1 of 25

1.4.1 Trigonometry Flashcards

  1. A Level
  2. /Maths
  3. /1.4.1 Trigonometry

25 flashcards on CCEA A Level Maths 1.4.1 Trigonometry: the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.

Flashcards