Question

In AABC right angled at B, if tan A= √3, then cos A cos C- sin A sin C - (A) - 1 (B) O (C) 1 (D) √3/2 ​

Answer 1

Answer:

HERE U GO MATE

tan A=  √3/1

by pythagoras theorem, find the missing side- hypotenuse ( ans=2)

* LHS -  cosA x cos C = 1/2 x √3/2 = √3/2

now,

*RHS  -  sinA x sinC  = √3/2 x 1/2  = √3/2

LHS - RHS  

√3/2-√3/2= 0

THUS, YOUR ANSWER IS opt B  ;  0

HOPE THIS HELPED...

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Answer 2

to simple please don't be confused