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Trigonometric Equations/Identities

Questions (3)

Given that sec x = 3/5, csc y = 3 where x and y are in the first quadrant. Find the exact value of sin (x + y).
1. 1 answer
2. asked by wani
3. 435 views
Prove: tanA+2tan2A+4tan4A+8cot8A=cotA
1. 2 answers
2. asked by kishor
3. 556 views
Simplify the trigonometric functionsin^4⁡x-cos^4⁡x cos^2⁡â-sin^2⁡â=1+2cos⁡â (1+cot^2⁡x )(cos^2⁡x )=cot^2⁡x
1. 2 answers
2. asked by Anonymous
3. 527 views