Trigonometric Identities
Gbogbo ọrọ náà
The trigonometric functions are tightly bound together by a small set of identities that hold for every angle. The most famous, \(\sin^2 A+\cos^2 A=1\), comes straight from Pythagoras, and two close relatives extend it to the reciprocal functions. These identities are the workhorses for simplifying and proving trigonometric statements.
In this lesson you will meet the three Pythagorean identities and use them to simplify expressions and prove results. Mastering them lets you rewrite a tangled expression in a cleaner form and is essential for solving trigonometric equations later in the course.
Ebumnobi
- Know and use the identities sin^2 A + cos^2 A = 1, sec^2 A = 1 + tan^2 A and cosec^2 A = 1 + cot^2 A.
Akọmọ Ojú-ẹkọ
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Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Trigonometric Identities. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which identity is true for every angle A? A. sin A + cos A = 1 B. sin^2 A + cos^2 A = 1 C. sin^2 A - cos^2 A = 1 D. sin A cos A = 1 Answer: B
- The identity sec^2 A equals: A. 1 - tan^2 A B. 1 + tan^2 A C. tan^2 A - 1 D. 1 + cot^2 A Answer: B
- Simplify sec^2 A - tan^2 A. A. 0 B. 1 C. 2 D. tan^2 A Answer: B
- 1 + cot^2 A is equal to: A. sec^2 A B. cosec^2 A C. tan^2 A D. sin^2 A Answer: B
- The expression (sin^2 A + cos^2 A)/cos^2 A simplifies to: A. sin^2 A B. sec^2 A C. cosec^2 A D. 1 Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
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Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Trigonometric Identities? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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