TMUA Practice Question — Worked Solution

P2·Trigonometry·3.5CrackTMUA Original

pythagorean-identityexact-valueseven-odd-symmetry

Let

θ

be any real number. Consider the following statements.

sin^{2} θ = (1 - cos θ) (1 + cos θ)

for every real

θ

sin 3 0^{\circ} + sin 6 0^{\circ} = sin 9 0^{\circ}

III

cos (- θ) = cos θ

for every real

θ

Which of the statements must be true?

Discussion

No discussions yet. Stuck, or want to share an approach? Start the first one.