= _________________
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 2.
Concept Used:
sin2A + cos2A = 1
cos(90 - A) = sinA
tan(90 - A) = cot A
Explanation:
From the given question,
cos235° + cos55°sin35° +
⇒ cos235° + cos(90 - 35°)sin35° +
⇒ cos235° + sin235° + 1
⇒ 1 + 1 = 2
Hence the value of cos235° + cos55°sin35° + is 2.