" (ii) "sin(5 pi)/(12)cos(pi)/(12)

Find the value of 2cos((5 pi)/(12))cos((pi)/(12)) and 2sin((5 pi)/(12))cos((pi)/(12))

Prove that 2sin((5 pi)/(12))cos((pi)/(12))=(2+sqrt(3))/(2)

Prove that 2"sin"(5pi)/(12)"cos"(pi)/(12)=(sqrt3+2)/2

Convert each of the following products into the sum or difference of sines and cosines (i). 2sin5xcosx(ii). 2cos4xcos3x(iii). 2sin3xsinx(iv). sin((5pi)/12).cos(pi/12)(v). cos((5pi)/12)cos(pi/12)

Value of sin((7 pi)/(12))+cos((7 pi)/(12)) is equal to

Find the value of 2cos((5pi)/12) cos(pi/12) and 2sin((5pi)/12)cos(pi/12)

Prove that: 15sin(5pi)/(12)+15cos(5pi)/(12)-20sin^3(5pi)/(12)-20cos(5pi)/(12)=0

Find the value of cos""(pi)/(12)(sin""(5pi)/(12)+cos""(pi)/(4))+sin""(pi)/(12)(cos""(5pi)/(12)-sin""(pi)/(4)) .

Find the value of cos""(pi)/(12)(sin""(5pi)/(12)+cos""(pi)/(4))+sin""(pi)/(12)(cos""(5pi)/(12)-sin""(pi)/(4)) .

((1+cos(pi/(12))+i sin ((pi)/(12)))/(1+cos (pi/(12))- i sin (pi/(12))))^(72) is equal to