For an acute angle ,

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

Problem

For an acute angle

A

,

3 \sin A = 4 \cos A

. Find the value of

\sin^{2} A - \cos^{2} A

. (a)

1

(b)

-\dfrac{7}{25}

(c)

\dfrac{7}{25}

(d)

\dfrac{1}{5}

Related theory

Browse the problem library