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1.4.3 Trigonometry

Card 1 of 20

For an angle θ\thetaθ in a right-angled triangle, sin⁡θ=\sin\theta=sinθ= [...]\text{[...]}[...].

A

The substitution is invalid: the angle must lie between the sides.

B

Side aaa is opposite angle AAA.

C

For an angle θ\thetaθ in a right-angled triangle, sin⁡θ=\sin\theta=sinθ= oppositehypotenuse\boxed{\frac{\text{opposite}}{\text{hypotenuse}}}hypotenuseopposite​​.

D

If sides aaa and bbb enclose angle CCC, then Area=12absin⁡C\boxed{\text{Area}=\frac12ab\sin C}Area=21​absinC​.

Card 1 of 20

1.4.3 Trigonometry Flashcards

  1. A Level
  2. /Maths
  3. /1.4.3 Trigonometry

20 flashcards on CCEA A Level Maths 1.4.3 Trigonometry: the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.

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