2024年2月28日 · Theorem csc15∘ = csc π 12 = 6–√ + 2–√ csc 15 ∘ = csc π 12 = 6 + 2 where csc csc denotes cosecant. Proof

2021年1月21日 · This video works out the exact value of csc (15), the cosecant of 15 degrees, by using a reciprocal function (sine) and the difference formula for sine.

2022年12月13日 · If from a point A on the ground the angle of elevation of R is 60° and the part PR of the tower subtends an angle of 15° at A, then the height of the tower is :

三角函数计算器,三角函数表,度与弧度的换算,正弦,余弦,正切,余切sin, cos, tan, cot, sec, cosec三角函数计算器

Find value of csc (15) or Cosec (15) - Cosecant or Calculate value of Sin, Cos, Tan, Cot, Cosec, Sec, SinH, CosH, TanH, CotH, CosecH, SecH, ASin, ACos, ATan, ACot, ACosec, ASec and other trigonometry function

2019年6月26日 · Here I have applied csc (x) = 1/sin (x) identity to find the value of csc15. Application of this identity, to find cosecant of 15 degree, requires us to find the value of sin (15).

cosec 15º = 1 sin 15 ∘ Consider sin 15° = sin (45° – 30°) = sin 45° cos 30° – cos 45° sin 30° = 1 2 × 3 2 - 1 2 × 1 2 = 3 2 2 - 1 2 2 = 3 - 1 2 2 cosec 15° = 1 sin 15 ∘ = 2 2 3 - 1

2025年2月11日 · Given: sec (5α - 15°) = cosec (15° - 2α) Concept used: Calculation: sec (5α - 15°) = cosec (15° - 2α) ⇒ s

cosec sec 75 ° cosec 15 ° = cosec sec (90 ° - 15 °) cosec 15 ° = cosec cosec cosec 15 ° cosec 15 ° = 1

To find the secant of an angle with a calculator, begin by entering the angle in degrees or radians (depending on what mode your calculator is in). Press the csc button on the calculator. Note …