sin 42° sec 48 ° + cos 42 ° cosec 48° =2
Answers
Answered by
25
sin 42° = cos 48°...... ¹
cosec 48° = sec 48°.....²
So, cos 48° sec48° + cos 42° sec 42° = 2
cosec 48° = sec 48°.....²
So, cos 48° sec48° + cos 42° sec 42° = 2
Answered by
3
Hence proved that sin 42° sec 48 ° + cos 42 ° cosec 48° = 2.
Step-by-step explanation:
To prove,
sin 42° sec 48 ° + cos 42 ° cosec 48° = 2
So,
by considering;
sin 42° sec 48 ° + cos 42 ° cosec 48°
⇒ sin 42° * sec(90° - 42°) + cos 42° * cosec(90° - 42°)
⇒ sin 42° * cosec42° + cos 42° * sec42°
⇒ sin 42° * 1/sin42° + cos42° * 1/cos 42°
by cancelling sin 42° with sin42° and cos 42° with cos42°, we get
⇒ 1 + 1 = 2
Hence proved that
sin 42° sec 48 ° + cos 42 ° cosec 48° = 2
Learn more: Trigonometry
brainly.in/question/11371684
Similar questions