Home
Class 11
MATHS
Prove that:cos(x+135^@)-cos(x-135^@)=-sq...

Prove that:`cos(x+135^@)-cos(x-135^@)=-sqrt2 sinx`

Answer

Step by step text solution for Prove that:cos(x+135^@)-cos(x-135^@)=-sqrt2 sinx by MATHS experts to help you in doubts & scoring excellent marks in Class 11 exams.

Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • TRIGNOMETRIC FUNCTIONS

    JBD PUBLICATION|Exercise EXAMPLE|67 Videos

  • STRAIGHT LINES

    JBD PUBLICATION|Exercise EXAMPLE|39 Videos

Similar Questions

Explore conceptually related problems

Prove that cos4x = 2cos^2(2x) - 1

Prove that: (cos 135^@ - cos120^@)/(cos 135^@ + cos120^@) =3-2 sqrt2 .

Prove that: cos2x cos(x/2)-cos3x cos((9x)/2)=sin5x sin((5x)/2)

Prove that: (sinx +sin3x)/(cosx+cos3x)=tan2x

Prove that : cos^-1 (cos^2x - sin^2x) = 2x

Prove that cos^-1 ((sin x + cos x )/(sqrt2)) = x - (pi/4), (pi/4) le x le ((5pi)/4)

Prove that (cos5x - cosx)/(sin5x - 2sin3x + sinx) = cotx

Prove that cos((pi)/(4)+x)+cos((pi)/(4)-x)=sqrt(2)cosx

Prove that : (cos 9x - cos 5x)/(sin 17x -sin 3x)=- (sin 2x)/(cos 10x) .

Prove that 3cos^(-1)x=cos^(-1)(4x^(3)-3x),x in[(1)/(2),1]

Home
Profile