Solve for Sides and Angles Using Sin Cos and An

In triangle ABC, a = 5, b = 6, c = 7. Which law will be used FIRST to solve the triangle?

• Law of Sines

• Law of Cosines

• Both trig laws

• None of these

Which equation could be used to find the length of side AC?

Which equation could be used to find the measure of angle P?

Which equation could be used to find the length of side AB?

If we are given sides a and c along with angle A, which of the following can be found by using the law of sines?

• side b

• angle B

• angle C

• side b, angle B and angle C

For the given triangle ABC, \angle C can be found by using the equation

Which equation could be used to solve for the variable?

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Which equation could be used to solve for x?

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What equation can be used to solve for x?

• Sin(40°)= x/40 

• Sin(40º)=x/19

• Cos(40º)=x/19

• Tan(40°)=19/x

Calculate cos X. Make sure your fraction is simplified (reduced to lowest terms).

• 6/10

• 6/8

• 8/10

• 4/5