Question

Find the value of (1) Sin 35 Cos 30 - Cos 45 Sin 30 (II) Cos 60 Cos 45 + Sin 60 Sin 45​

Answer 1

Answer:

.H.S

sin45⋅cos45  

o

+sin30

=  

2

​

 

1

​

.  

2

​

 

1

​

+  

2

1

​

 

=  

2

1

​

+  

2

1

​

 

=  

2

2

​

 

=1

Now,

L.H.S

tan3x=1

But tan45  

o

=1

∴tan3x=tan45

⇒3x=45

⇒x=  

3

45

​

 

∴x=15.

Step-by-step explanation: