" iit "cos(A-B)=cos A*cos B+sin A*sin B" If "A=B=60^(@)

If A=60^(@),B==30^(@) then verify that cos(A+B)=cos A*cos B-sin A*sin B

If A=60⁰ and B=30⁰ , verify that cos (A-B)=cos A cos B+sin A sin B

Varify the formula for A=60^@ and B=30^@ . cos(A-B)=cos A cos B+sin A sin B

If A=60⁰ and B=30⁰ , verify that cos(A+B)=cos A cos B-sin A sin B

Prove that formula cos(A-B)=cos A*cos B+sin A*sin Bwith the help of the formula sin(A+B)=sin A*cos B+cos A*sin B

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^(@).

If A = 30^(@) and B = 60^(@) , verify that cos (A + B) = cos A cos B - sin A sin B.

If A= 30° and B = 60°, verify that cos (A+ B) = cos A cos B - sin A sin B.

If sin (A-B)=sin A cos B-cos A sin B and cos (A - B) = cos A cos B + sin A sin B . find the values of sin 15^@ and cos 15^@.

If A=B=60o, verify that cos(A-B)=cos A cos B+sin A sin B(iii)sin(A-B)=sin A cos B-cos A sin B(iii)tan(A-B)=(tan A-tan B)/(1+tan A tan B)