Question

Find the value of 4 Tan ²45°- 8Cos²60° + Cos²90°

Answer 1

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Answer 2

Answer:

2

Step-by-step explanation:

4 Tan ²45°- 8Cos²60° + Cos²90°

Tan 45° is 1

Cos 60° is 1/2

Cos 90° is 0 now substitute all the values in tht question

4(1)² - 8(1/2)² + (0)²

1² is 1..... (1/2)² is 1²/2²= 1/2*2 = 1/4...... 0² is 0*0= 0

4(1) -8(1/4) +0

4 - 8/4

4 - 2 [8/4= 2]

2

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