Question

help me in this question

Answer 1

Answer:

sec(90-Ф)=cosecФ

cot(90-Ф)=tanФ

sec(90-(65+Ф)) -sec(25-Ф) -cot(90-(55-Ф))+cot(35+Ф)

sec(25-Ф)-sec(25-Ф)-cot(35+Ф)+cot(35+Ф)

=0

Step-by-step explanation:

Answer 2

Answer:

0

Step-by-step explanation:

By applying ( 90 -  θ ) Concept

Cosec ( 65° +  θ ) - Sec ( 25° -  θ) - tan ( 55° -  θ ) + Cot ( 35° +  θ)

⇒ Cosec ( 65° +  θ ) - cosec [90° - (25° - θ)] -  tan ( 55° -  θ ) + tan [90° - (35° + θ)]

⇒  Cosec ( 65° +  θ ) -  Cosec ( 65° +  θ ) -  tan ( 55° -  θ ) +  tan ( 55° -  θ )

⇒ 0

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