Question

Asked Oct 24, 2019

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Find the exact value of the expression using the provided information.

Find cos(s + t) given that cos s =1/3, with s in quadrant I, and sin t=-1/2 with t in quadrant IV.

Step 1

To determine the value of cos (s + t).

Step 2

**Given information:**

The trigonometric functions are given below.

Step 3

**Used concept:**

**1**. Pythagoras theorem:

Let hypotenuse is h, perpendicular...

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