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Calculating Heights and Distances

PROVE THAT 1...

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PROVE THAT 1/2sina is equal to sina/2.cosa/2

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If sinA + 2cosA = 1. Prove that 2sinA -cosA= 2.

- 2 sin \frac{A}{2} = - \sqrt{1 + sin A} - \sqrt{1 - sin A}

Q. If cosA+sinB=m and sinA+cosB=n, prove that

2 s i n (A + B) = m^{2} + n^{2} - 2

if cosA+sinB=m and sinA+cosB=n, prove that 2sin(A+B)=m²+n²-2

Q. If cos A +sinB =m and sinA+cosB=n prove that 2sin(A+B)=m²+n²-2

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Calculating Heights and Distances

Standard IX Mathematics

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