*Transformation formulae sinA + sinB = 2sinC cosD
*Transformation formulae
sinA + sinB = 2sinC cosD
sinA – sinB = 2cosC sinD
cosA + cosB = 2cosC cosD
cosA – cosB = – 2sinC sinD
*Transformation formulae
sinA + sinB = 2sinC cosD
sinA – sinB = 2cosC sinD
cosA + cosB = 2cosC cosD
cosA – cosB = – 2sinC sinD