Question

Q4. Find the value of : 4sin²30 + 3tan²60 - 2cos²45
answer quick please

Answer 1

Answer:

Answer is 9

Step-by-step explanation:

solution

$4 { \sin ^{2} (30) } + 3 { \tan^{2} (60) } - 2 { \cos {}^{2} (45) }$

$4 \times ( \frac{1}{2} ) ^{2} + 3 \times ( \sqrt{3) ^{2} } - 2 \times ( \frac{1}{ \sqrt{2} } ) ^{2}$

$4 \times \frac{1}{4} + 3 \times 3 - 2 \times \frac{1}{2}$

$1 + 9 - 1$

= 9 Ans