A card from a free library — ask anything, no account, works offline. Every card carries its source.
sin²x + cos²x = 1 · cos 2x = 1 − 2 sin²x
verified · 1 month ago
Verdict: HOLDS. • sin(x)**2+cos(x)**2 = 1; the two sides are equal -- each reduces to 1, so their difference simplifies to 0 • cos(2*x) = 1-2*sin(x)**2; the two sides are equal -- each reduces to cos(2*x), so their difference simplifies to 0 Sealed and independently re-checkable: https://narrowhighway.com/s/c91b041e82af9af480694ebb2b72f9ce50de2107b2087fa2eb53323070d7cb0b
source
card id
card_v_23b7ec8074a4
address
UNPLACED
adjoining cards
- part of → The created order — the science of the floor — a verified seed of the created order (mathematics)
- demonstrates → Euler's identity, assembled from its parts — A worked demonstration in the same field (mathematics).
- demonstrates → Differentiate twice: position → velocity → acceleration — A worked demonstration in the same field (mathematics).
- demonstrates → From the unit circle to the double-angle law — A worked demonstration in the same field (mathematics).
Is this card incomplete? Tell the library — it will call out for more ↗