TS EAMCET · Maths · Inverse Trigonometric Functions
If then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
sin-1x5+cosec-154=π2 ⇒sin-1x5=π2-cosec-154 ⇒sin-1x5=π2-sin-145 sin-1x+cos-1x=π2⇒sin-1x=π2-cos-1x ⇒sin-1x5=cos-145 We know, cos-145=sin-135 ⇒sin-1x5=sin-135 So, x=3 ⇒5+x=8
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