wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If sin−135+cos−11213=cos−1ab.
Find the value of a+b.

A
9
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
32
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
98
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
121
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 98
Given: sin135+cos11213=cos1ab ....... (i)
Now, sin135+cos11213
=cos145+cos11213
=cos1(45.121335.513)
=cos13365
sin135+cos11213=cos13365
Comparing with (i), we get
a=33 and b=65.
Hence, a+b=98.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Definition of Function
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon