The notation L≡RL\equiv RL≡R means both sides are equal for [ ].
A
cos2x≡2cos2x−1\cos2x\equiv2\cos^2x-1cos2x≡2cos2x−1
B
The simplified expression may be defined where the original factor was zero.
C
The notation L≡RL\equiv RL≡R means both sides are equal for every value in their common domain.
D
The more complicated side.
3.5.8 Trigonometry (A-level only) Flashcards
Flashcards for WJEC A Level Maths 3.5.8 Trigonometry (A-level only), covering the key formulae, methods and definitions you need to recall for AS Unit 1, AS Unit 2, A2 Unit 3 and A2 Unit 4. 21 cards, matched to the WJEC A Level Maths (1300QS) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.