If `alpha,beta` are complementary angles,`sin alpha=(4)/(5),` then `sin alpha cos beta+cos alpha sin beta=`

If alpha,beta are complementary angles and sin alpha=(3)/(5), then sin alpha cos beta-cos alpha sin beta=

What is sin (alpha+beta) - 2 sin alpha cos beta + sin(alpha- beta) =

Prove by vector methods that sin(alpha+beta)=sin alpha cos beta+cos alpha sin beta

If sin alpha+sin beta=a and cos alpha-cos beta=b then

Evaluate: quad =|cos alpha cos beta cos alpha sin beta-sin alpha-sin beta cos beta0sin alpha cos beta sin alpha sin beta cos alpha|

If (alpha+beta+gamma+delta)=pi then sum cos alpha cos beta-sum sin alpha sin beta=

if alpha and beta satisfy sin alpha cos beta=-(1)/(2), then the greatest value of 2cos alpha sin beta is

Find the value of, cos alpha cos beta, cos alpha sin beta, -no alpha-sin beta, cos beta, 0 sin alpha cos beta, sin alpha sin beta, cos alpha] |

If cos alpha+cos beta=0=sin alpha+sin beta then cos2 alpha+cos2 beta=

If alpha and beta satisfy sin alpha cos beta=-((1)/(2)), then the greatest value of 2cos alpha sin beta is