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00:00 - 00:59 | hello students question save that here if the projection of vector a on X Y and Z Axis are to 1 and 2 units respectively find the angle at at which vector a vector and b vector of incline to the z-axis formula is that it's a plant that is your we can write that can write your course Kama is equals to 1 upon X square + b square ok so here here is the formula for A 21 I |

01:00 - 01:59 | am to you so we can write a vector is equals to 2 I ok left check yeah ok ok now now we have to find the magnitude of a the magnitude of a is equals to the under root under it will be it will be even and in place of a two 1932 now Alpha is equal to write 151 is 22 upon |

02:00 - 02:59 | inverse Cos inverse |