Question

verify that cos 60 = cos square 30 - sin square 30 = 1/2​

Answer 1

Answer:

Verified

Step-by-step explanation:

Answer 2

Step-by-step explanation:

firstly firstly taking LHS

cos60= 1/2

taking middle term

cos square 30 - sin square 30

(√3/2)^2 - (1/2)^2

3/4 - 1/4

(3-1)/4

2/4

1/2

verified

1/2 =1/2= 1/2