What is the value of cos2° 67°-sin2° 23°
Answers
Answered by
0
zero,sin90-∅(tita)=cos∅(tita)
Answered by
1
Answer:
Step-by-step explanation:
= 2Cos 67 - 2Sin 23
= 2{ Cos (90 - 23) - Sin 23 }
= 2{ Sin 23 -Sin 23 }
= 2 * 0
= 0
Similar questions