Question

cot2 30 degree -2nd cos2 60 degree-*3/4 sec 2 45 degree-4 sin2 30 degree

Answer 1

Answer:

Now,

cot  

2

30  

o

−2cos  

2

60  

o

−  

4

3

​  

sec  

2

45  

o

−sin  

2

30  

o

 

=(  

3

​  

)  

2

−2×  

2  

2

 

1

​  

−  

4

3

​  

×(  

2

​  

)  

2

−  

2  

2

 

1

​  

 

=3−  

2

1

​  

−  

2

3

​  

−  

4

1

​  

 

=3−2−  

4

1

​  

 

=1−  

4

1

​  

 

=  

4

3