Using trig angle addition identities: manipulating expressions ... Khan Academy is a 501(c)(3) nonprofit organization. ... Math: high school & college · Test prep ...

Продолжительность: 3:07
Опубликовано: 9 авг. 2016 г.

Identities that come from sums, differences, multiples, and fractions of angles · cos ⁡ θ cos ⁡ ϕ · cos ⁡ ϕ · 1 · sin ⁡ ϕ · sin ⁡ θ cos ⁡ ϕ · cos ⁡ θ sin ⁡ ϕ ...

Продолжительность: 3:57
Опубликовано: 26 мая 2020 г.

Trigonometry · Unit circle · Radians & degrees · Unit circle (with radians) · Use the Pythagorean identity · Trig values of π/6, π/4, and π/3 · Trig identities ... Reciprocal trig ratios · Trig challenge problem · Right triangles & trigonometry

Продолжительность: 10:05
Опубликовано: 9 нояб. 2021 г.

Math: high school & college · Algebra 1 (TX TEKS) ... Khan for educators · Khan for educators (US). NEW ... Trigonometric identities challenge problems ...

Apply trigonometric identities to verify identities and solve equations. Identities include: Pythagorean, reciprocal, quotient, sum/difference, double-angle ...

Продолжительность: 11:07
Опубликовано: 18 янв. 2016 г.