Question

4 3. If cosA cot A-sin A then find the value of 2tanA 5​

Answer 1

Answer:

cosA=4/5

sinA=±3/5

tanA=±3/4

cotA=±4/3

∴{cotA-sinA}/2tanA

≡{(cosA/sinA)-sinA/{2sinA/cosA}

≡{(c-s²)/s}×c/2s

=c{c-s²}/2s²

=½{c²-cs²}/s²

=½{(16/25)-(4/5)(9/25)}/(9/25)

=½{(80–3)/125}×(25/9)

=77/90