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BITSAT Mathematics Three Dimensional Geometry 2021 BITSAT 2021

BITSAT Mathematics Question (2021) — Solution

Question

A line makes angles of 45^ and 60^ with the positive axes of X and Y respectively. The angle made by the same line with the positive axis of Z, is

Options

  1. A. 30^ or 60^
  2. B. 60^ or 90^
  3. C. 90^ or 120^
  4. D. 60^ or 120^

Answer

D. 60^ or 120^

Step-by-step solution

Given =45^ , =60^ , =? array l ^ 2 + ^ 2 + ^ 2 =1 \\ ^ 2 =1- 1 2 - 1 4 = 1 4 \\ y =60^ or 120^ array

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