[" 11.If "cos(a+beta)=0," then "sin(a],[-beta)" can be reduced to "]

If cos(alpha + beta)=0 , then sin (alpha-beta) can be reduced to

If cos(alpha + beta)=0 , then sin (alpha-beta) can be reduced to

If cos (alpha+beta)=0 , then sin(alpha-beta) canbe reduced to : (a) cosbeta (b) cos2beta ( c) sinalpha (d) sin2alpha

If cos(alpha + beta) =0 , then sin (alpha- beta)= ________

If cos(alpha+beta)=0 then sin^(2)alpha+sin^(2)beta

If cot(alpha+beta)=0, then sin(alpha+2 beta) can be (a)-sin alpha(b)sin beta(c)cos alpha(d)cos beta

If 4tan beta=3, then (4sin beta-3cos beta)/(4sin beta+3cos beta)=

If sin alpha sin beta - cos alpha cos beta + 1 = 0,"show that", sin (alpha + beta) = 0, "hence deduce that," 1 + cot alpha tan beta = 0.

If 4 tan beta = 3 , then (4 sin beta - 3 cos beta)/( 4 sin beta + 3 cos beta)=

Evaluate |[cos alpha cos beta, cos alpha sin beta, -sin alpha],[ -sin beta, cos beta, 0],[ sin alpha cos beta, sin alpha sin beta, cos alpha]|