book Maths Puzzle Numerical Ability

(1) find the exact value of sec(225degrees)



(2) In the triangle ABC, find A, if B= 100 degrees, and a=20.


(3) In the triangle ABC, find b, iF A=15, C=12 and angle b=150 degrees.

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book Other Question
The cost for paint to cover both sides of a large road side sign (front side and back side) was $150.00. a 5-gallon can of paint costs $25.00 and will cover 250 square feet. The si I need To Simplify the following square roots in simplest radical form and I have no clue how to do this

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