Ask a New Question
Search
if A+B+C=180degrees, prove that 2sin(B+C)sinA=1-cos2A
if A+B+C=180degrees, prove that 2sin(B+C)sinA=1-cos2A
3 answers
asked by
Sarah
570 views
how do you solve this.prove: cos2A plus cosA divided by sin2A minus sinA equal to cos2A plus 1 divided by sinA
1 answer
asked by
lungisile ntobela
1,156 views
Prove:
1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
1 answer
asked by
Piwo
610 views
Prove:
1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA
1 answer
asked by
Piwo
1,201 views
Prove :
1 + Sin2A/ Cos2A = CosA + SinA / CosA- SinA
5 answers
asked by
clive
2,495 views
Let A=(cosA -sinA)
(sinA cosA) show that A^2=(cos2A sin2A) (sin2A cos2A)
1 answer
asked by
James
642 views
In any angle ABC prove that the perimeter = a/Sin A(Sin A + Sin B + Sin C)
Start with perimeter = a+b+c but b= aSinB/sinA and c=
0 answers
asked by
Anonymous
535 views
sina=3/5, pi/2<a<pi evaluate cos2a
1 answer
asked by
Anonymous
545 views
If sinA=0.5 , what is the value of cos2A and sin2A?
1 answer
asked by
Partha banerjee
1,464 views
Verify/prove the following:
(sinA+tanA)/(1+secA) = sinA ______________________________ tanu = 1+sinu-cos^2u/cosu(1+sinu)
1 answer
asked by
Kid
735 views