Evaluate:- 2sin^2 3π/4 + 2Cos^2 π/4 +2sec^2 3π/4
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1
Answer:
-2
Step-by-step explanation:
2sin²3π/4+2cos²π/4+2sec²3π/4
= 2sin²135°+2cos²45°+2sec²135°
=2sin²(180-45°)+2(1/√2)²+2sec²(180-45°)
=2sin²45°+2×1/2-2sec²45°
=2×1/2+1-2×2
=1+1-4
=2-4
= -2
hope this helps you
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