Question

Evalute 2 tan² 45°+ cos² 30°- sin² 60°

Answer 1

Answer:

2(1)^2+(√3/2)^2-(√3/2)^2

2+3/4-3/4

2

Step-by-step explanation:

put the values of tan45 ,cos30 and sin60

Answer 2

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$= 2 \tan {}^{2} (45) + \cos {}^{2} (30) - \sin {}^{2} (60) \\ = 2(1) {}^{2} + ( \frac{ \sqrt{3} }{2} ) {}^{2} - ( \frac{ \sqrt{3} }{2} ) \\ = 2 + \frac{3}{4} - \frac{3}{4}$

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