prove that: cos 7pi/12+ cos pi/12=sin 5pi/12? sin pi/12 This question has not been answered yet! Don't worry! You can check out similar questions with solutions below Prove that - cos pi/12 - sin pi/12 = 1/root 2 Prove that cos7pi/12 + cos pi/12 = sin 5pi/12 - sin pi/12 ... Evaluate : sin 7pi/12 . cos pi/4 - cos 7pi/12 . sin pi/4 ... the value of sin 5 pi/12 cos pi/12 + cos 5pi/12 sin pi/12 ... 7pi/4 Q3. Evaluate: tan pi/12.tan pi/16.tan 5pi/12.tan 7pi ...