Answer
$4$
Work Step by Step
We need to compute $4 \ \sin 90^{\circ} -3 \tan 180^{\circ}$.
Note that $\sin{90^\circ}=1$ and $\tan{180^\circ}=0$, then:
$4 \ \sin 90^{\circ} -3 \tan 180^{\circ}
\\= (4) (1)- (3) (0)\\=4$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 5 - Trigonometric Functions - Section 5.2 Trigonometric Functions: Unit Circle Approach - 5.2 Assess Your Understanding - Page 402: 39
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