24 Evaluate :
5 cos 60° + 4 sec230°-tan 45º
sin? 30° + cos? 30​

Question

24 Evaluate :
5 cos 60° + 4 sec230°-tan 45º
sin? 30° + cos? 30​

in progress 0
Alaia 3 months 2021-07-17T13:44:08+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-07-17T13:45:44+00:00

    Answer:

    Given:    ( 5cos²60° + 4sec²30° -tan²45°) / sin²30° + cos²30°

    ⇒ [5× (1/2)² + 4 ×(2/√3)² – (1)²]  / (1/2)² + (√3/2)²

    ( as cos 60° = 1/2 , sec 30° = 2/√3 , tan 45° = 1 ,sin 30° = 1/2 and cos 30° = √3/2)

    ⇒  [5 × 1/4 + 4 × 4 /3 -1]   / 1/4 + 3/4

    ⇒  [5/4 + 16/3 -1]   / 1/4 + 3/4

    ⇒  [(15 + 64 – 12)/12] / 4/4

    ⇒ 67 / 12 is the correct answer.  

     

     Hope it will help u.

    mark this as brainliast.

Leave an answer

Browse

9:3-3+1x3-4:2 = ? ( )