1. dik. cos α = 4/5 . tent. nilai sin α dan tan α ?? 2. dik. tan × = p. tent perbandingan trigonometri berikut dalam p a. sin × b. cos × c. sin (90⁰-×) d. cos (90⁰-×) 3. jika dik. sin 55⁰ = α tent. nilai perbandingan trigonometri dalam α a. cos 55⁰ b. tan 55⁰ c. sin 35⁰ d. cos 35⁰
yoesamudra
Cosα = 4/5, maka => sisi samping = 4 sisi miring = 5 sisi depan = = 3 Sinα =
tanα =
2. tan α = p maka => sisi depan = p sisi samping = 1 sisi miring =
sin α =
cos α =
sin (90 - α) = cos α =
cos (90 - α) = sin α =
3. sin 55 = α cos 55 = sin( 90 - 55) = sin (90 - α)
sisi miring = 5
sisi depan =
= 3
Sinα =
tanα =
2. tan α = p maka => sisi depan = p
sisi samping = 1
sisi miring =
sin α =
cos α =
sin (90 - α) = cos α =
cos (90 - α) = sin α =
3. sin 55 = α
cos 55 = sin( 90 - 55)
= sin (90 - α)
Tan 55 =
sin 35 = cos (90 - 55)
= cos (90 - α)
cos 35 = sin (90-55)
= sin (90 - α)
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