CBSE Class 10 Answered
If cos9A = sinA and 9A < 90*, then the value of tan 5A is
Asked by | 29 Sep, 2012, 10:14: PM
Expert Answer
9A < 90* means A < 10*.
A < 10* means A < 90*.
For X between 0* to 90*, the values of sin X are different.
So, A = 9A
That is 8A = 0
So, A = 0*.
Now, 5A = 5 × 0* = 0*.
Hence, tan 5A = tan 0* = 0.
Answered by | 29 Sep, 2012, 10:27: PM
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