21. Evaluate the following : 2 tan^2 45 degree+cos^2 45 degree - sin^2 60 degree
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Answer:
3/4
Step-by-step explanation:
2tan²45°+cos²45°- sin²60°
2(1)²+(1/√2)²-(√3/2)²
2+1/2-3/4
(4+2-3)/4
3/4
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