Question

The value of (sec245 - cot245) - (sin230 + sin260) is

A) 1 B) 2√3 C) 0 D) 1/√2

Answer 1

Answer:

C) 0

Step-by-step explanation:

(sec²45° - cot²45°) - (sin²30° + sin²60°)

⇒(√2² - 1²) - ((1/2)² + (√3/2)²

⇒(2-1) - (1/4 + 3/4)

⇒(1) - (4/4)

⇒1 - 1

⇒0