" Itah "A=1," tah "B=sqrt(3)vec d cos A*cos B-sin A*sin sqrt(3)

If tan A=1 and tan B=sqrt(3), evaluate cos A cos B-sin A sin B

If tan A =1 and tan b = sqrt3 , evaluate : cos A cos B - sin A sin B.

If tan A =1 and tan b = sqrt3 , evaluate : sin A cos B+ cos A sin B.

sin A + sin B = sqrt(3) ( cos B- cos A )implies sin 3A + sin 3B=

If sin A=(1)/(sqrt(5)) and sin B=(1)/(sqrt(10)) ,find the values of cos A and cos B .Hence using the formula cos(A+B)=cos A cos B-sin A sin B, show that (A+B)=45^(@).

In Delta ABC, if sin A+sin B+sin B+sin C=1+sqrt(2) and cos A+cos B+cos C=sqrt(2) then the triangle is

If 0ltAltBltpi, sin A-sinB=(1)/(sqrt2) and cos A-cos B=sqrt((3)/(2)) , then the value of A+B is equal to

If 0ltAltBltpi, sin A-sinB=(1)/(sqrt2) and cos A-cos B=sqrt((3)/(2)) , then the value of A+B is equal to

In triangleABC , right angle at C, if tan A = 1/sqrt3 . Show that sin A cos B -cos A sin B = - 1/2 .

If 0