pleeaasee hellpp!!

posted by .

A and B are positive acute angles. If sin A=(3/5) and cosB= (12/13) find the value of sin (A+B)

  • Math -

    See my last response.

  • pleeaasee hellpp!! -

    obviously its math so can you please just do the problem

  • pleeaasee hellpp!! -

    Please note that we don't do students' homework for them. Be sure to go back into your textbook or use a good search engine. http://hanlib.sou.edu/searchtools/

    Once YOU have come up with attempted answers to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to comment on your thinking.

  • pleeaasee hellpp!! -

    first you have to find the angles cosA and
    SinB using pythogoras theorem. Then using the property expand Sin(A+B)and then substitute the given values. similarly do the same for cos(A+B) and find the quadrant in which A+B lies. That's it!!!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    find all solutions in the interval [0,2 pi) sin(x+(3.14/3) + sin(x- 3.14/3) =1 sin^4 x cos^2 x Since sin (a+b) = sina cosb + cosb sina and sin (a-b) = sina cosb - cosb sina, the first problem can be written 2 sin x cos (pi/3)= sin …
  2. pleeaasee hellpp!!

    if sin A= the square root of eleven over 7, find the value of cos 2A.
  3. pleeaasee hellpp!!

    if sec x=the square root of 5/2 with angle x in quadrant IV and than y= -(1/3) with angle in quadrant II, find the value of sin (x-y)
  4. math

    if a and b are acute angles, sin(a+b)= 56/65, and sin b = 5/13, find sin a
  5. math

    if a and b are acute angles, sin(a+b)= 56/65, and sin b = 5/13, find sin a
  6. trig

    if x and y are positive acute angles, tan x=1/3and tan y =1/4, find the value of sin(x-y)
  7. Math

    If A and B are acute angle such that SinA=8/17 and CosB=3/5.Find 1, Cos(A+B) 2, Sin(A+B) 3, Sin(A-B)
  8. Math

    If A and B are acute angle such that SinA=8/17 and CosB=3/5.Find 1, Cos(A+B) 2, Sin(A+B) 3, Sin(A-B)
  9. Trigonometry

    If cos(a)=1/2 and sin(b)=2/3, find sin(a+b), if 1) Both angles are acute; Answer: (sqrt(15)+2)/6 ii) a is an acute angle and pi/2 < b < pi; Answer: (2-sqrt(15))/6 2. Find the exact value of the six trigonometric functions of …
  10. trig

    A and B are positive acute angles. if sin A=4/5 and cos B=8/17 find the value of tan (A-B) is the answer =43/100

More Similar Questions