If `sin C = (15)/(17)`, then find cos A.

If sin C =( 15)/(17) , then find cos C ,

If Sin A = 15/17 then find cos A.

In a triangle XYZ, angleY is right angle, XZ = 17 m and YZ = 15 cm, then find cos Z

If Cos c = 3/5, then find Sin c and Tan c.

If sin A = cos A then find the value of A.

In Delta ABC , if ( sin A)/(4) = (sin B)/(5) = (sin C)/( 6) then the value of cos A +cos B +cos C =

If A+B+C=(pi)/(2) , then prove that cos 2A + cos 2B + cos 2C=1+4 sin A sin B sin C .

In a right angle triangle ABC, right angle is at B, if tan A = sqrt 3 , then find the value of cos A cos C - sin A sin C

In a right angle triangle ABC, right angle is at B ,If tan A=sqrt(3) , then find the value of (i) sin A cos C+ cos A sin C "