Question

Evaluate: 3 sin² 30° + 2 tan² 60° - 5 cos² 45°.​

Answer 1

Answer:

4.25

Step-by-step explanation:

sin 30 = 1/2

tan 60 = $\sqrt{3}$

cos 45 = 1/$\sqrt{2}$

3(1/2)^2 + 2($\sqrt{3}$)^2 - 5(1/$\sqrt{2}$)^2

= 3/4 + 2x3 - 5/2

= 0.75 + 6 - 2.5

= 4.25

Hope this helps

Answer 2

Answer:

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Step-by-step explanation:

sin30=1/2

tan60=√3

cos45=1/√2