Question

Find the value of: 3 sin² 60° + 2 tan² 45° - 5 cos² 45°​

Answer 1

Answer:

Evaluate: 2 tan² 45°+ cos² 30° - sin² 60. 2 ... 5 answers ... =2+3/4-3/4. =2 ... 5 sin square 30 + cos square 45 - 4 x square 30 / 2 sin 30 into cos 30 + tan 45 find the value.

Answer 2

$3 \: { \sin }^{2} 60 \degree + 2 \: { \tan }^{2} 45 \degree - 5 { \cos}^{2} 45 \degree \\ \\ \sf \: \: putting \: \: the \: \: values \: \: of \: \: the \: \: ratios \: \: \: of \: \: angles \\ \\ \to \: 3 { \bigg( \frac{ \sqrt{3} }{2} \bigg)}^{2} + 2 \times {(1)}^{2} - 5 { \bigg( \frac{1}{ \sqrt{2} }\bigg)}^{2} \\ \\ \to \frac{9}{2} + 2 - \frac{5}{2} \\ \\ \to \bf \: 4 \:$

• Table of trigonometry ratios is attached in Photo