Question
Determined the simplified value of the given
expression:(1 - sin2Â q) X (sec q + tan q) X (sec q - tan q) X cosec2Â qSolution
(1 - sin2 q) X (sec q + tan q) X (sec q - tan q) X cosec2 q= cos2 q X (sec2 q - tan2 q) X cosec2 q ...... (Using sin2 a + cos2 a = 1)= cos2 q X (1/sin2 q) ....... (Using sec2 a - tan2 a = 1)= cot² q
The angle between the planes x − y + z = 1 and 2x + y − 3z = 5 is:
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13, 55, 111, 183, 273, ?Â
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