M
sin
1 + COJA
l-cosa
sina
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7
Answer:
How do I prove that (SinA/1+cosA) + (1+cosA/sinA) = 2 (cosec A)?
Praveenkumar Kalikeri
Answered September 24, 2017
sinA1+cosA+1+cosAsinA
=sinA.sinA+(1+cosA).(1+cosA)sinA(1+cosA)
=sin2A+1+cos2A+2cosAsinA(1+cosA)
=2+2cosAsinA(1+cosA)
=2(1+cosA)sinA(1+cosA)
=2sinA
=2 cscA
sinA1+cosA+1+cosAsinA=2cscA
Note:
sin2A+cos2A=1
sinA=1cscA
hope it's help you ✌️
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