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Trigonometrical Identities — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsTrigonometrical Identities1 Mark
Question
Evaluate:
$14 \sin 30^\circ + 6 \cos 60^\circ - 5 \tan 45^\circ$
✓

Answer

$14 \sin 30^{\circ}+6 \cos 60^{\circ}-5 \tan 45^{\circ}$
$=14\left(\frac{1}{2}\right)+6\left(\frac{1}{2}\right)-5(1)$
$=7+3-5=5$

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