trigonometry

posted by .

sinA= 3/5 and C=17
Finding a and b

• trigonometry -

sin A = 3/5 = a/c

if side a = 3 and side c = 5
you should recognize this as a
special rt triangle of 3-4-5
so b = 4

If not
a^2 + b^2 = c^2
3^2 + b^2 = 5^2
b^2 = 16
b = 4

so, a = 3, b = 4

Similar Questions

1. Trig

Please help with this one. I've worked it out in so many ways and can't tell what's correct. sinA sinA ----- - ------ 1+sinA 1-sinA Which answer is correct for the problem above?
2. Maths

Hi, can someone give me the answer to this question: secA-tanA=1/4. Find cosA I got: CosA=4(1-sinA) Is my answer good?
3. trigonometry

If sinA+tanA=p then sin2A?
4. maths(trigonometry)

prove that sinA-cosA+1/sinA+cosA-1=1/secA-tanA
5. trigonometry

sinA= 3/5 and C=17 Finding a and b Their two triangles and i have to find the ratio i just can’t seem to set up the problem right but i gave an example of one of the practice exercise that dealt with finding only (a) so i got confused …
6. Trigonometry

IfA=340°, prove that 2sinA/2 = -(v1+sinA) + (v1-sinA)
7. further mathematics

Let P=(cosA sinA) (sinA cosA) Q=(cosB sinA) (sinB cosA) show that PQ=(cosA(A-B) sin(A B)) (sinA(A B) cos(A-B))
8. Pre-calculus (Trigonometry)

The rotating spotlight from the Coast Guard ship can illuminate up to a distance of 250 m. An observer on the shore is 500 m from the ship. HIs line of sight to the ship makes an angle of 20 degrees with the shoreline. What length …
9. trigonometry

Prove : 1 + Sin2A/ Cos2A = CosA + SinA / CosA- SinA
10. trigonometry

x×sin^3A=y , cos^3A = sinA × cosA , x×sinA= y×cosA , then prove that x^2+ y^2= 1 I have no idea

More Similar Questions