Advertisements
Advertisements
प्रश्न
In ΔABC, ∠B = 90°. If AB = 12units and BC = 5units, find: sinA
उत्तर
In ΔABC,
AC2 = AB2 + BC2
⇒ AC = `sqrt("AB"^2 + "BC"^2)`
⇒ AC = `sqrt(12^2 + 5^2)`
= `sqrt(144 + 25)`
= 13
AB = 12units
BC = 5units
AC = 13units
sin A
= `"Perpendicular"/"Hypotenuse"`
= `"BC"/"AC"`
= `(5)/(13)`.
APPEARS IN
संबंधित प्रश्न
If 8 tan A = 15, find sin A – cos A.
If sin θ = ` (a^2 - b^2)/(a^2+b^2)`find all the values of all T-ratios of θ .
If sin A = `9/41` find all the values of cos A and tan A
If cos A = `(1)/(2)` and sin B = `(1)/(sqrt2)`, find the value of: `(tan"A" – tan"B")/(1+tan"A" tan"B")`.
Are angles A and B from the same triangle? Explain.
In the given figure, triangle ABC is right-angled at B. D is the foot of the perpendicular from B to AC. Given that BC = 3 cm and AB = 4 cm.
find :
- tan ∠DBC
- sin ∠DBA
In triangle ABC, AB = AC = 15 cm and BC = 18 cm. Find:
- cos B
- sin C
- tan2 B - sec2 B + 2
In each of the following, one trigonometric ratio is given. Find the values of the other trigonometric.
sec B = `(15)/(12)`
In the given figure, PQR is a triangle, in which QS ⊥ PR, QS = 3 cm, PS = 4 cm and QR = 12 cm, find the value of: sin P
In the given figure, PQR is a triangle, in which QS ⊥ PR, QS = 3 cm, PS = 4 cm and QR = 12 cm, find the value of: cot2P - cosec2P
From the given figure, find the values of cos C
