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Trigonometric Equations with Angle Sum, Difference, Multiple, Half-Angle Formulas problems
Trigonometric Equation Double-Angle and Product-To-Sum example
Solve the following Trigonometric Equations using Double-Angle and Product-To-Sum formulas:
sin2θ – sinθ = 0
cosx + cos3x = cos2x
Solution to this Trigonometric Equation Double-Angle Product-To-Sum practice problem is provided in the video below!
Trigonometric Angle Sum, Difference, Multiple, Half-Angle Formulas problems
Trigonometric Angle Sum and Difference example question
Find the value of the following Trigonometric Expressions using Angle Sum or Difference formulas:
cos(105º)
Solution to this Trigonometric Angle Sum Difference practice problem is provided in the video below!
Trigonometric Identity Proof problems
Trigonometric Identity Proofs example problem #1
Show that
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example question #2
Show that the following equation is valid.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proofs example #3
Prove the validity of the following equation.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example problem #4
Prove that
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proofs example question #5
Prove the following identity.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example #6
Show that the following identity holds.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proofs example problem #7
Prove the following identity.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example question #8
Verify the given identity.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proofs example #9
Show that the identity given below is valid.
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example problem #10
Verify the given three Trigonometric Identities:
(a)
(b)
(c)
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example question #11
Show that the following Trigonometric Identity is true:
Solution to this Trigonometric Identity Proof practice problem is given in the video below!
Trigonometric Identity Proof example question #12
Verify that the following Trigonometric Identities hold:
a. sin(-x) = -sin(x)
b. 
c. 
d. sin(2x) = 2sin(x)cos(x)
e. 
f. cos(-x) = cos(x)
g. 
Solution to this Trigonometric Identity Proof practice example question is given in the video below!
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