Question

If sin theta=root 5 upon 2 root 5 and tan theta =root 5 upon 7 then what is the value of cos theta

Answer 1

mention question clearly please

Answer 2

Answer:

7/2$\sqrt{5}$

Step-by-step explanation:

given:- sinФ=√5/2√5

            tanФ=√5/7

find:-cosФ

proof:-

                                           sinФ=√5/2√5  ⇒sinФ=1/2

tanФ=√5/7⇒sinФ/cosФ=√5/7

⇒(putting the value of sinФ)

⇒1/2cosФ=√5/7

⇒∴ cosФ=7/2√5