Question

Can someone please solve the 3rd question both the parts

Answer 1

Answer: PLZZ MARK AS BRAINLIEST

Step-by-step explanation:

1) cot²Ф - 1/sin²Ф

cot²Ф - cosec²Ф (1/sinФ = cosecФ)

we know that cosec²Ф - cot²Ф = 1

∴cot²Ф - cosec²Ф = -1

2) sinФ= cosФ

   sinФ is equal to  cos Ф only if the value of Ф= 45°

  ∴ 2 tanФ + cos²Ф

    = 2 tan 45° + cos² 45°

    = 2(1) + (1/√2)²   ( tan 45° = 1 , cos 45° = 1/√2)

     = 2 + 1/2 = 5/2

Answer 2

Answer:

Step-by-step explanation: