Prove that: `sin^-1 (12/13)+cos^-1(4/5)+tan^-1(63/16)=pi`

Explanation

here, `alpha + beta + gamma = pi`

`sin alpha = 12/13`

so, `tan alpha = 12/5`

and `cos beta = 4/5`

so, `tan beta= 3/4`

and `tan gamma = 63/16`

so,`alpha + beta = pi -gamma`

`tan(alpha + beta) = tan(pi- gamma)`

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