Question

2T an^2 45º + Cos^2 30º – Sin^260°=​

Answer 1

Answer:

5/2

Step-by-step explanation:

We know that,

Sin 30° = 1/2

Cos 30°= ✓3/2

Tan 45° = 1

==> 2 Tan² 45° + Cos² 30° - Sin² 60°

==> 2 (Tan 45°)² + (Cos 30°)² - (Sin 30°)²

==> 2(1)² + (✓3/2)² - (1/2)²

==> 2 + 3/4 - 1/4

==> (2*4 + 3 - 1)/4

==> (8 + 3 - 1)/4

==> 10/4

==> 5/2

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