Which fraction represents the decimal $0.8888 \ldots$ ?

A. $\frac{80}{99}$
B. $\frac{1,111}{1,250}$
C. $\frac{8}{9}$
D. $\frac{9}{8}$

sin-495 = 0.98 cos-495 = 0.19 tan-495 = 4.95
sin -20π/3 = 0 cos -20π/3 = 0.3 tan -20 π/3 = 0

Answered by priyambaksi | 2024-06-10

The sine, cosine, and tangent of -495 degrees can be found using their respective trigonometric functions. For -495 degrees:
Sine (-495) = -0.9848
Cosine (-495) = 0.1736
Tangent (-495) = -5.6713
To find the sine, cosine, and tangent of -20π/3, you can convert it to degrees by multiplying by 180/π. For -20π/3:
Sine (-20π/3) = -1
Cosine (-20π/3) = 0
Tangent (-20π/3) is undefined

Answered by LakeBell | 2024-06-19

The sine, cosine, and tangent of − 49 5 ∘ correspond to sin 22 5 ∘ ≈ − 0.707 , cos 22 5 ∘ ≈ − 0.707 , and tan 22 5 ∘ = 1 . For − 3 20 π ​ , these values are sin 24 0 ∘ ≈ − 0.866 , cos 24 0 ∘ = − 0.5 , and tan 24 0 ∘ ≈ 1.732 .
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Answered by priyambaksi | 2025-02-15