Question

* Is it right to say that cos(60°+30°) = cos 60° cos 30° - sin 60° sin 30°.
slove this clearly on paper...​

Answer 1

Answer:

Yes, the statement is correct.

As we have cos(A+B)=cosA.cosB−sinA.sinB. [ Standard formular]

For the given problem, A=60°

B=30°

Step-by-step explanation:

I hope that it will help you

Answer 2

Answer:

(60+30) -90 degree (60+30)-(60-30)- 0

Step-by-step explanation:

my answer is 90 and 0