5. If a sin? 0 + b cos2 0 = C, then prove that
tan Ꮎ =√c-b/a-c
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Step-by-step explanation:
ANSWER
asin
2
θ+bcos
2
θ=c
cos
2
θ(atan
2
θ+b)=c
atan
2
θ+b=csec
2
θ
atan
2
θ+b=c+ctan
2
θ
(a−c)tan
2
θ=c−b
∴tan
2
θ=
a−c
c−b
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