Home
Class 11
MATHS
सिद्ध कीजिए कि - "cos 2x cos"(x)/(2)-"co...

सिद्ध कीजिए कि - `"cos 2x cos"(x)/(2)-"cos 3x cos"(9x)/(2)="sin 5x sin"(5x)/(2)`.

Promotional Banner

Similar Questions

Explore conceptually related problems

cos x cos((x)/(2))-cos3x cos((9x)/(2))=sin7x sin8x

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

Prove that, cos2xcos""(x)/(2)-cos3xcos""(9x)/(2)=sin5xsin""(5x)/(2) .

Prove that cos 2xcos(x/2)-cos 3x cos((9x)/2)= sin5x sin((5x)/2) .

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

Prove that cos 2x cos "" x/2 -cos 3x cos " (9x)/(2) = sin 5x sin ""(5x)/(2).

Prove that cos 2x cos "" x/2 -cos 3x cos " (9x)/(2) = sin 5x sin ""(5x)/(2).

Prove that cos 2x cos "" x/2 -cos 3x cos " (9x)/(2) = sin 5x sin ""(5x)/(2).

Prove that cos 2x cos "" x/2 -cos 3x cos " (9x)/(2) = sin 5x sin ""(5x)/(2).