CBSE Class 11-science Maths Advanced Trigonometric Formulae

• Please someone solve No. 15.iii)
  
• The equation sinx(sinx+cosx)=k has real solutions if and only if k is a real number such that_____________?  
• If f(x)=2(7cosx+24sinx)(7sinx-24cosx), then find the maximum value of (f(x))^1/4
• Cot 4x (sin5x + sin3x)= cot x (sin5x - sin3x)
• In ?ABC, If r1=8, r2=12, r3=24,Show that a=12,b=16,c=20. (From 
• Which of the following is the correct option?
  
• If acos θ = bcos (θ+120°) = c cos (θ+240°) , then find the value of 1/a+1/b+1/c
• If 13θ= π , find the value of 3θ+cos5θ + 2cosθcos9θ
• Prove that,
• If  find the value of

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