C should be your answer:))))
Answer: see proof below
<u>Step-by-step explanation:</u>

Use the following Identities:
sec Ф = 1/cos Ф
cos² Ф + sin² Ф = 1
<u>Proof LHS → RHS</u>






i√5
steps:
negative square root is called a complex number
for a negative square root standard form means have an i in the number
i = √-1
standard form for a complex number is
a+bi
√-5 = √5 x √-1
i√5
michael lipp
brian mclogan
Answer:
D
Step-by-step explanation:
When exponents are multiplied by exponents, they add together and leave the base untouched.