To find the exact value of using two standard angles with known exact trigonometric…

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

To find the exact value of

\sin 105^{\circ}

using two standard angles with known exact trigonometric values, 105° should be expressed as (a)

90^{\circ} + 15^{\circ}

(b)

60^{\circ} + 45^{\circ}

(c)

60^{\circ} - 45^{\circ}

(d)

60^{\circ} + 30^{\circ}