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Vector p makes an angle ,a,b,g with the X,Y,Z axes respectively then Sina*Sina+sinb*sinb+sing*sing =?
since p makes an angle ,a,b,g with the X,Y,Z axes respectively, cosa, cosb, cosg are known as direction cosines of p, where, cos2a + cos2b + cos2g =11-sin2a + 1-sin2b + 1-sin2g = 13 – sin2a – sin2b – sin2g =1sin2a + sin2b + sin2g =2
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