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If siny=cosx, then find dy/dx

  1. How do I get (sinx cosy + cosx siny) (cosx cosy + sinx siny) in the form of 1/2(sin2x + sin2y)?
    1. answers icon 1 answer
    2. Anonymous asked by Anonymous
    3. views icon 700 views
  2. If siny=cosx, then find dy/dx at the point (pi/2, pi)A. -1 B. 0 C. 1 D. pi/2 E. None of these I got C
    1. answers icon 2 answers
    2. Sarah asked by Sarah
    3. views icon 2,088 views
  3. (Cosx)^y=x^siny find dy/dx at point pi/(4,0)
    1. answers icon 2 answers
    2. Collins asked by Collins
    3. views icon 493 views
  4. giving that cosx=4/5 and siny=12/13, find cos(x+y) when x is acute and y is obtuse angle
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    2. edward damia asked by edward damia
    3. views icon 507 views
  5. Suppose that cosx= -3/5 and x is in the third quadrant, and that siny= 2/9 and y is in the second quadrant. Find the exact
    1. answers icon 1 answer
    2. Help asked by Help
    3. views icon 780 views
  6. [Note: This one... is super hard for me :( I really need help. please. I only have 2 hours left and I have no idea what I'm
    1. answers icon 2 answers
    2. Amber asked by Amber
    3. views icon 668 views
  7. if f(x)=sinx, show that f(x+y)-f(x)=cosx siny-2sinx sin^2(y/2)
    1. answers icon 1 answer
    2. John Rey asked by John Rey
    3. views icon 353 views
  8. sinx+ siny/ (cosx+cosy)= tan 1/2 (x+y)prove this identity
    1. answers icon 0 answers
    2. JK asked by JK
    3. views icon 1,304 views
  9. 2tan^-1(tanx/2×tan(π/4-y/2))=tan^-1(sinx×siny/cosx+cosy)
    1. answers icon 1 answer
    2. Mansi asked by Mansi
    3. views icon 577 views
  10. Find y'(x) when cos y - y^2 = 8a) -siny - 2y b) - (1/sin y - 2y) c) 0 d) - (8/cos y - y) So if I implicitly differentiate: y'(x)
    1. answers icon 2 answers
    2. Donna asked by Donna
    3. views icon 559 views