Solve and find the value of:
cos60 cos30 - sin60 sin30
Answers
Answered by
3
cos(A+B) = cosA.cosB - sinA.sinB
cos60.cos30 - sin60.sin30 = cos 90°
= 0
cos60.cos30 - sin60.sin30 = cos 90°
= 0
Answered by
4
Answer:Answer will be zero
Step-by-step explanation:
Cos60° = 1/2
Sin60° = ✓3/2
Cos30° = ✓3/2
And,
Sin30° = 1/2
Therefore,
Cos 60° × Cos30 - Sin60° × Sin30°
=> 1/2 × ✓3/2 - ✓3/2 × 1/2
=> ✓3/4 - ✓3/4
=> ✓3-✓3/4
=> 0/4
=> 0
Similar questions