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In the diagram belwo, P(-8;t) is a point in the Cartesian plane such that OP=17 units and reflex $X\hat{O}P = \theta$

  1. Calculate the value of $t$
  2. Determine the value of each of the following without using a calculator. (a) $\cos{(-\theta)}$ (b) $1 - \sin{\theta}$

 

 

 

in Grade 11 Maths by Diamond (40.1k points) | 13 views

1 Answer

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1. x^2 + y^2 = r^2

    (-8)^2 + t^2=17

     t= -15

2a. = cosx

      = -8/17

 b. = 1- -15/17

        = 17/17 + 15/17

        = 32/17  = 1 15/17
by Silver Status (31.3k points)

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