Question

value of Cos15° Cos7½° Cos7½° ​

Answer 1

Answer:

cos15  

∘

cos7  

2

1

​  

 

∘

sin7  

2

1

​  

 

∘

 

=  

2

1

​  

cos15  

∘

(2cos7  

2

1

​  

 

∘

sin7  

2

1

​  

 

∘

)

(Multiply and divide by 2)

=  

2

1

​  

cos15  

∘

sin15  

∘

 

=  

4

1

​  

(2sin15  

∘

cos15  

∘

)=  

4

1

​  

(sin30  

∘

)=  

4

1

​  

⋅  

2

1

​  

=  

8

1

​  

 

Formula used: 2sinθcosθ=sin2θ

Step-by-step explanation:

Please  mark me as brainliest